Does anyone have any broken XTR rear derailleurs around?

I have 2 perfectly good derailleurs that I'd like to fix and I can't seem
to find the b-tension screw tab piece anywhere.... which is the piece that
I am specifically looking for. It's called a b-axle assembly in the parts diagram
on the shimano site.

Of course, the XT assembly doesn't fit into the XTR ones... argh.