Problem with a the E30 4wd is one front driveshaft goes exactly where the RHD steering stuff needs to be.
RHD stuff,
Audi 80 / A4 / 100 / A6 / A8 / TT VW Passat Syncro, Golf / Bora / Jetta 4 motion Sierra XR4x4 / GLS 4x4 / Cosworth / Ghia 4x4 /Mondeo Mk1 4x4 / Escort RS2000 4x4 Vauxhall Cavalier / Calibra 4x4 Subaru Legacy / Impreza / Forester / Justy / GLF / SVX Fiat Panda Citroen BX Metro 6R4 :-) Random Mitsubishi / Toyota / Mazda / Honda stuff BMW 525iX
LHD you can get a Citroen AX 4x4 amongst others..