I think most VR6s came with Leather steering wheels, but all gti's except with leather interior came with standard wheels and gear sticks.? But i would guess it was all optional so there are all kinds of combinations out there. Who knows.
Anyway, the part nos for the bits are as follows:
Leather steering wheel (airbag models) exc. airbag? ?1HO 419 091 AQ 01C? ?253.94
Leather gear knob and boot 1HO 711 118 M 1BX ?104.59
There are a few options for the gear knob but i think this is the standard leather one. Also the pricing module on my copy of ETKA is out of date, so don't take those prices as being correct.
I have seen quite a few leather steering wheels on ebay recently so keep your eye out there.