Hi,
I am looking to see if anybody has a good rear brake rotor that will fit an 80 iron head laying around? I cant seem to find one at swap meets or anywhere else around here..

 

That reardisk should be fit from Sportster 1979-91 OEM#41971-79A
diameter 11,5" countersunk mounting holes, new disk (stainless) costs about $100....zinc $35...