it needs to be a 90spec mk2 one, or mk3, or passat or corrado. pre-90 mk2, mk1 etc wont fit as the plugs and ign lock housings are different. you can fit a non-mfa 90spec one though, if you cant find a gti one. non-mfa can be had from mk3 polo, some seat models etc.
you might be able to pull the mfa end bit off and swap it over, i did try this with a pre-90 one but it wouldnt work as stalk was different. not tried on a 90spec yet tho