I'd say not too many. With only 97 AWD Calibras imported to this country, I'd say most are scrap by now. I know on Saabworx, one guy has basically adapted some Audi AWD gearbox to a B204 (which shares the same gearbox pattern as the Opel/Vauxhall Family 1 and 2 engines). From memory, he was looking at stuffing the Haldex AWD system into a Corsa B.