I also bought a 10+ year old Denon amplifier and overall it's great, but over time it developed some minor issues with components like Alps potentiometers and s

I also bought a 10+ year old Denon amplifier and overall it's great, but over time it developed some minor issues with components like Alps potentiometers and switches. Unfortunately, Alps doesn't produce some of those parts anymore (like the ones discussed here: https://www.diyaudio.com/community/threads/source-for-alps-alpine-rotary-band-switch-cables.372091/ https://www.diyaudio.com/community/threads/source-for-alps-a...), so it's really not easy to source parts for repairs. It would be nice if you could simply ask the manufacturer to sell these components to you directly.