I've got a spare number 8 Enduro half. Not in the best of shape and short of a piston. Not sure if that's the one you want though as pistons are same size for these. Is yours the XC version?
enduro is the earlier version that uses the 'pro' lever, M4 is the later version that uses the 'mini' lever. It's actually the inner caliper half that I'm after.
Thanks,
Iain