Here is a parts list and DIY for the floor mounted shifter I built for my e30. It is similar to the Bimmerworld race shifter or the AKG stage 2 shifter (not as pretty, but also not nearly as expensive).
Parts list:
Spherical bearing: FK bearing WSSX12T, x1
Bearing weld cup: FK bearing CPW12, x1
Bronze Bushings: McMaster 5448T5, x2
1/2x13 Coupling Nut: McMaster 90264A485, x1
High Misalignment Spacers: 3/4" to 1/2", x1 pair
1/2x13 stainless nut