First we found the fender musicmaster bass amp/Rhodes piano knobs that we did a group buy a while back, but I can't find those on eBay any more. I have two kicking around, so I trimmed the f logo top part off of the pointer metal surround.

The bit you have to trim off/remove

There are also Randall knobs with numbers on the metal ring, but R on the plastic. Side by side they look very similar, so i was hoping to find a few of each to see if I can fit the F plastic to the Randall metal piece.

Next up is sourcing parts, I have 2 pointer knobs, now I need to find some Randall knobs to take apart. If anyone knows where I can get more of each, that would be awesome as I am sure there is bound to be some trial and error in this whole process.