i remember reading a thread on BF.C where it was ultimately concluded that its easier to buy the RHD harness. AFAIK its a couple hundred.
hid lights hid kits
Hot: 2001 Estoril M Roadster
ZCP 19's, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt
ZCP 19's, ZHP knob, GROM, OEM 18's,