Ninjaflex or TPU is quite an expensive material right now. The last I check, you can get a 500 gram spool for less than RM 200. I don't know any local vendors that stock this material as it is considered specialized material. Also if you are planning to print using this material on your own, then I wish you good luck.

So welcome to the 3D printer discussion. You have to find outside sources for those filaments, I don't recommend Ebay from what @DarkTenno has experience for PLA filaments. The nearest supplier is in Singapore for Ninjaflex, you can try this vendor Meka, just let him know I recommended him to you. As for softPLA, I don't know any vendor nearby that has this material. You could also try contacting a local vendor that sells 3D printer filament for help, if they are willing to do so.