...but it turns out that even G&L could not get CTS to supply them. The ones they sent me were a brand I'd never heard of, as was the original in my bass.
The stock pots in my G&L Tribute S-500 were made by and branded Mighty Mite (that continues to be one of my real "seller's remorse" guitars btw). They were a bit weird in that only half of the casing was metal. The rest of it was ABS plastic.