Probably not OEM, but many members here have bought them from RockAuto and they worked just fine.
Glad to hear you were finally able to test the clutch.
Did you test all the fuses on the top of your RCM with a meter or test light ?
Sometimes they can be blown and you can't see it with your eye.
I had one RCM a fellow in Pensacola sent me ( I sent him my spare ), it was fine except the engine control relay would not energize.
I sent it to tighed1 and he replaced the relay for me and it's fine now.