Widely available bro on the road, same case with the G1M (Gagasan 1 Malaysia) plates.
Both registration numbers are widely used to camouflage the origin of the car (i.e Langkawi cars) to use on mainland without getting suspicious to the authority. This is the reason why you would see a lot of supercars, Ferrari and whatnot using the G1M and 1M4U numberplates. Recently there have been crackdown on these practices and the customs had been seizing a lot of these cars which avoided paying the appropriate taxes.