I mold blank knobs and then CNC cut the graphics, so I'll produce anything you like, it doesn't matter if its one-off... so, yes, PTO knobs are available.
And sure, buy three+ and I'll give you a price break: you only have to pay shipping once

I'm kidding, how about 10% off for qty 3 or more... ?
So you want this knob:
But with this pattern on it?:
I'd be happy to do that for you if you send me the 4speed knob to mold. Obviously you'd end up with a 4speed shape knob, with recessed cut graphics like the 5 speed knob - I can't do ink stamping like the original 4 speed. But I
could try to keep the look of the 4 speed graphic by cutting in those white rings and such...?