Hi Paul, yeah Rally design sell one for the S2 RST, the mk3 steering rack and mk4 racks are the same. check their website :
http://www.rallydesign.co.uk/catalog...oducts_id=7315
I have one from them on my S2 RST and its a decent bit of kit, makes the car feel like a go-kart but down side is it makes the steering heavy at anything under 30 mph.