Brad, if you want to do this, I can help you. I make all my own dots here, and I have special precision plug cutters that I machined up just for this purpose. I also have boxes full of rosewood cutoffs, the rectangles cut off the end of rosewood fingerboard blanks. It would take me ten minutes to make up a set of cross-grain rosewood plugs for you. Send me a decent picture of the fingerboard and I can probably match the color and grain of the rosewood pretty well.
I have plug cutters for 1/4", 8mm (about 5/16") and 3/8" dots.
Send me a PM and we'll work out the details.
There's a trick to neatly removing dots with minimal damage to the fingerboard wood. First, make a centerpunch mark right in the middle of the dot. You have to do it by eye; take your time. Next, drill a little hole, like 3/32" diameter, in the center of the dot, down through it. Then, use a brad point bit that's slightly (1/64" or 1/32") smaller in diameter than the dot. As you drill down into the dot with that bit, the thin outer ring of dot that's left will shatter and break the glue joint, and get pulled out by the bit. In almost all cases, it will extract the dot with no harm to the wood.
If you want to enlarge the hole, to put in a larger dot or plug, use the same process with the center punch and the small pilot hole. Then use a brad point or Forstner bit of the size you want. The point of the bit will follow right down the pilot hole.
