First, a little more light from Symetrix: they posted the schematic.
http://www.symetrixaudio.com/kb/501_sch.pdf
Is the removed, broken pot servicable, at least to measure? Or even disassemble and look at the guts? Sometimes there are clues in how the track is screened onto the wafer.
I'm guessing that it's an audio taper pot. But to contradict the markings, I've got an Alpha audio taper pot sitting next to me, clearly marked "A" taper, and 8 linears, all marked "B."
As for testing, they're different, but it's hard to know why...they could be different revisions. There are several trimpots inside that could be calibrated differently. There could be some variance between the pots.
I'm afraid I don't know what "flying wires" is either
Using a pot that doesn't fit the PCB (perhaps with the detent, but without the right kind of legs), then running wired from it's legs to the PCB footprint.
I just can't tell if they have the center detent
If they don't say detent, there's probably no detent...
Does Mouser sell to the public in small quantities?
If they stock what you're looking for, they do. If it's not stocked, you might have to meet the factory minimum quantity (which it's looking like, to get the PCB mount, audio taper, flatted shaft, with detent). They're consistently one of the best vendors I deal with...I probably order from the 20+ times a year.
You could always try to most likely source, and see if Symetrix have any spares.
