Outside KL, you may have...

A.K.A. Car Accessories & Body Kit @ Shah Alam           
https://www.facebook.com/AKACARACCESSORIES/

Asia Bodykit @ Shah Alam
https://www.facebook.com/asiabodykit.official/

GS Accessories @ Jln 222, PJ ....... Mazda authorized installer and most expensive
http://gs.com.my/v2/

Redzone Motorsports @ Sunway
https://www.facebook.com/RedzoneMotorsports/

Forgot the name but 2 shops away from Redzone Motorsports@Sunway

Asia bodykit and carbon in motion got, google it you can find some other sellers as well

you can do it in sc also
see if the water vapor gone after few days then after driving in rain try check again, some said is normal for new car while i dont have this problem, but my rear light got water vapor instead :sweat; now the vapor seems to be gone since i'm not always driving under rain
same issue with RVM but mine happened at at night driving at around 120-130 km/h, it just every few seconds it light up once

yours is the same issue as mine?

maybe the sensor is able to detect something that our eyes cant

can show us the pictures and what you installed?

Sorry to hear about your bad experience, bro. What did you install? You mean you wanted them to remove it but they refused? If there are so many holes in the bumper won't removing it be a bad idea?