The Supercar Registry - Early two piece front disc rotor hubs

Hello All
I have a set of early front disc brake rotor hubs with mounting bolts. (hubs only no rotors)They are in very good shape, other that one of them could really use a set of wheel studs. they both have the same part number inside of them but they are slightly different in that one of them has a groove on the side ( please see pics) different manufacturers or a revision maybe? The rotors came off of a Dec build 1970 Chevelle, however I believe they are the same for early Camaro as well. $100. for the pair plus the ride. I would prefer to be paid with pay pal through the friends and family deal so as not to cost anything to me. I will add more photos later today.