Some I found on shopee are:
https://shopee.com.my/product/96951541/1691073273?smtt=0.0.9
https://shopee.com.my/product/129774022/228...4649?smtt=0.0.9
https://shopee.com.my/product/118054474/207...3293?smtt=0.0.9
But all seem like require external power supply

Edit: Found my answer here: https://youtu.be/otYGnNbqeTA
In the comment section, the reviewer said can power up using the TV USB, or even Powerbank, cool!

Basics:
*Specs: SoC – Amlogic S905Y2 quad core ARM Cortex-A53 @ up to 2.0 GHz with Mali-G31 MP2 “Dvalin” GPU, Dual band Wifi ac 2.4/5GHz, 4GB LPDDR4 RAM and 32GB eMMC ROM, 1 USB port, 1 micro SD card, 1 infrared jack, 1 micro USB power port. No Ethernet port

*Powered by microusb port connected to power supply. Alternatively, if you don’t want clutter/ too many wires, can power it up using any spare USB port on your TV. I use the USB port denoted HDD on my TV as I believe it supplies more power (or maybe any USB port can be used).

*Portability: For travelling, I only need to bring this X96S android stick, a micro USB cable to connect to the TV USB port, and the 2.4G wireless air mouse remote

*Once it's plugged in, it automatically switches itself on. Comes with infrared extension for switch on/off. But I tried disconnecting this, and found I can do all functions with my 2.4G wireless air mouse remote. So, now I don’t use the IR extension anymore to reduce clutter

*Switched on and immediately firmware is updated OTA to Android 9 (I believe it came with Android 8.1). Firmware build now: X96S V311 P 201907161948

*UI is basic with Youtube, Kodi, Playstore, Apps, and cannot be customized. No navigation bar available. Contacted Acemax and they said updated firmware will have this soon. So, a bit difficult at first to navigate, but once get used to it, it is ok, because found out that I only use mostly home button and back button which is available on the remote

*Out of the 32GB, there's 24GB of total internal space available upon first boot.

*Bluetooth: works well- I connected my bluetooth mouse to set up the stick for the first time, as I found using air mouse a bit difficult. After setting up is complete, I just use the airmouse. But the bluetooth is still connected just in case

*The bundled remote is basic, no air mouse mode. So, I used a third party air mouse with keyboard for easier data entry. One USB port available to connect the 2.4G dongle. The remote’s power key can be set as either “Sleep Now”, “Shutdown”, or “Restart”. I maintain default “Shutdown”

*Speed Test over 2.4GHz: 19.3Mbps (Download), and 21.8Mbps (uploads). This is over powerline wifi extender as this stick is in my bedroom. However, was able to watch one full 1080p movie in Kodi with no problem (the main wifi with 5GHz is in living room which I have another android box). I then brought the stick to living room TV and tested on 5GHz with following results:  102Mbps (Download), and 67.6Mbps (uploads). 2.4Ghz (without powerline extender) results: 24.9Mbps (Download), and 44.8Mbps (uploads).

*Temperature (measured using CPU float app) does not go beyond 60degC while watching movie, which is about the same as Beelink GT-1 Mini

*Device is rooted

*HDMI-CEC works for elementum and YouTube, but not As*** Go (need to turn on HDMI-CEC switch first in Droid settings app)

*As per review from popular review website, Antutu benchmark score is 57379, which is about equivalent to my other proper android box, Beelink GT-1 mini

Programs/ Apps:
*AdAway works. Great for most pesky ads.

*Elementum works well

*Official As*** Go cannot be run on it, probably because rooted. The workaround works though, however, a bit stuttering when used in my room with powerline wifi extender.

*Pre-loaded YouTube works ok, however, somehow, 2.4g wireless air mouse only can do navigation, but cannot press ok & qwerty keyboard cannot type anything. Need to use original mouse for ok button, and on-screen keyboard to type

*There's also pre-loaded Netflix, but need to update, but in play store it said app is incompatible

*ATV launcher installs ok for those who needs it

Overall, I am very happy with the performance, bonus is that it is portable and reduces clutter