I couldn't find a supplier of 1/8" diameter Mahogany dowels to use as a plug for the screw hole in my neck pocket so, I made my own. I cut a 4" long piece of mahogany that was about 1/4" x 1/4". I did this on the bandsaw. Then, I just chucked up into my drill press and "turned" it with some sand paper.
In a few minutes, I had a round dowel rod. Then, I took all the Mahogany dust I made and put it aside to make a filler paste with since I had two little bits of tear out near the neck ferulles.
Dave