Hi everyone, I am about to replace the gain pots of a Mcintosh MC 2105. On the diagram, these pots are marked as "Part Number 134-191", 250K Ohm. I want to have original parts or modern parts which are dedicated specifically to replace original pots in MC 2105. Anyone could help and tell me where I can buy these pots. I also have other pots (of Fisher 500C and Eico ST70) to be replaced. If you know where I may find these parts, please let me know, i am very grateful for that. Thank you.