If you look around on some of the back posts, I seem to remember one poster showing pictures of his finished restoration and he was particularly proud of his cue ball shift knob. I'll see if I have any record of that post.
You might google "cue ball" with "shift knob" or "shifter knob" because I'd be surprised if somebody doesn't make one, or make a knob that looks like an actual cue ball.
LATER THAT SAME DAY - I just found the poster that has the cue ball shifter. His handle is Redline7000. You can find his pics in the gallery. Look at PICT2395.JPG