Help identifying MTB frame

Apologies making ANOTHER one of these threads…Anyhows:
Bought a bike third hand, frame has been stripped and painted. Trying to find make & model so I can get some offset bushings for the shock. I’m guessing this was either a custom build or a lot has been swapped out since, but just in case:

• Fork: Rockshox reba
• Shock: Fox Float RPL
• Brakes/Calipers: Avid ELIXIR 5
• Rear derailleur: Shimano XTR, 9 speed

One of the most identifiable things I could notice was the uneven chainstays.
Material is aluminium.
Serial (under BB) starts with “kcps00” if that helps at all.
Can take more pictures if needed.

Thanks!