Has anyone got one of these....?

I'm looking for a chain adjuster plate as the two that were on the bike don't match... People seem to make nice aftermarket anodised sideplates (that the axle goes through) but no-one does an aftermarket one of these. If I have to get a stock one then second-hand would be great.... The one on the right is the type I need - just the angled plate nearest the camera, not the rest of the adjuster.