Star Wars yokes -- as far as I know -- all have metal/steel handles.
If there is any interest I could likely check my RoadBlasters yoke to see if the handles could be made to rotate (but it looks like it would be mucho trouble to do and require many parts). Keep in mind, however, that RoadBlasters yokes use optic boards/encoder wheels rather than pots so there's more hardware you'd have to purchase (extra optic board, gears, encoder wheel) and the hack would be different (Opti-Pac or a mouse hack).
As for TwistyGrip, I got started on one of these and ended up just scrapping it and getting a SW yoke instead -- it didn't feel right, wasn't very sturdy, looked akward, and the buttons (that they suggest, anyways) feel crappy. I guess it works for some, but it would look kind of stupid on a cab.