If you're around Vancouver BC, Shails Motorcycles is moving soon and having a 'garage sale' this Saturday Oct 8. They have a lot of used Bimmer parts including Brick stuff. I was there 2 days ago and saw a really nice blue K fuel tank sitting on a shelf... If you're close by and needing parts, it would be worth a look. For the fellow looking for a gas cap, I did check, and he has one, but not giving it away ($80 used).

shailsmotorcycles.com

No affiliation, just a fan...