I e-mailed Ray Holland within the past hour. He responded very quickly--as follows...
"Your choice is brown or black. At one time someone was making them, but wanted a fortune for them and so I never did order a set. If you have a Harbor Freight nearby you can purchase a cheap set of punches and then look for an old felt hat or check a Michaels store for some felt. Cut out the small hole ¼ and then cut out the large diameter next.
If you ever have a problem with the radio, let me in as those are a specialty."
