Dude,
I'm also refering to the same thing. The glass cover of the headlights are available for purchase at most BMW workshops or parts retailer. If you ask most of the BMW workshops in JB, they are probably buying it from one of the major parts stockist in KL or so. I'd much rather buy it myself if I'm in KL or just head on down to SG. I don't think you're gonna find it at any of the usual accessories shops in JB just as yet!
BTW, has he sent the headlights to be removed and cleaned before ? That would be a cheaper alternative before he replaces the glass cover. Just a thought ...
Regards,
VaN.