Wanted. 17.5" mtb frame with disc mount

[Eatmorepies]

Having bought a new Marin FRS I have some nice bits going spare from my old
bike. Has anyone got a very nice Orange/Marin/Kona 17.5" frame with rear
disc mount available? (Other makes considered, but I know these ones).

I have a notion to build a disc braked hard tail. If it's an exotic
(expensive) item I am probably not interested.

Thanks

John