Its been a while since I had a Mark 3 but I'm pretty sure you can find refresh kits on EBay that will include all the little nylon bushes plus the golf ball bush that is down under the gear stick as I recall. Should be pretty cheap. Something like this?

VW GOLF MK3 GTI 1.8 1.9D GEAR SHIFT LINKAGE REPAIR KIT C290 | eBay