[sdiy] Dead Unobtainable Concentric Pot, What to do?

[James Coplin]

  I have an Orban 111B Spring Reverb here that has had scratchy pots 
since I bought it ages ago. It had gotten progressively worse to the 
point that I decided it was time to open up the pots and see what was 
up. The carbon tracks on one of the decks had worn through and was 
flaking off. Basically, the pot is dead. Unfortunately, it's a 
concentric 10k/500k CCW Log pot which I can't find a suitable 
replacement for. There are other concentric pots available but not in 
that split value -100k/100k, 500k/500k, . I really don't want to drill 
the front panel out unless that's an absolute last resort. Anyone have 
any thoughts on what I could do instead to get it back up and running?

James