As i posted in another post:
The PG200-pots are difficult to come by, until I found out that the only replaceable part in the whole Roland family comes from the tuning pot of the SH101 (!) I think that the part number is SPQ009F.
Check with Senso at www.vintageplanet.nl
- he can help you out with tuning pots for the 101 (i.e. PG200 pots)