Tail Light Bracket

I'm wondering if anybody can help me identify which bike the tail light bracket's from that was fitted to my KZ650 B1?  I'm guessing it was fitted by a previous owner so they didn't need a rear fender or it's just a botch repair after an accident.  

I'm actually keen to keep the bracket (I'd rather not have the rear fender) but the actual tail light needs replacing and I'd like to find the correct unit for the bracket rather than use the one for a KZ650 and drill extra holes to make it fit, as the previous owner did.