The one in the picture is a gen3 . The Gen 2 was discontinued by VAG by about 2008 so I think you might be lucky to find one. The gen3 fits but needs a bit of TLC from Vagcom . There is a nearly new one on eBay from a Golf R for £400 . Another option is a recon one from Western Power steering ( Bristol) who will charge circa £300 and not require any exchange . That might be your best and most cost effective option. Brand new ( gen3) from TPS I guess is north of £1500.
Oh, if you go gen3 you will need a gen3 loom. New from TPS they are about £120 and the part number is V1K2971111AJ . Gen 3 racks fir a Golf are 1k0909144J and the Audi equivalent 8J …….