Wow
sounds like my story exactly.

Took a few weeks to get a replacement stem in, Manitou wanted the LBS to make a minimum order which makes no sense since no LBS orders much Manitou anymore.

Had other riders give me their stems/forks/shocks in an effort to get me up and running before an 8hr race. Well, no go, and replacment stem doesn't work.

I've given up. I'm getting a new bike
Sorry. Hopefully a replacement stem works for you.