Convert from hub rotor assembly to separate parts?

That's a pretty piece, but looks custom machined I'm thinking. I think I found the individual listing for them as well: Mopar Billet Aluminum Hub

Found these on an old for sale ad here. Guessing they are probably still SBP since they are A body, but I've found B body ones for sale as well that I wonder if they would fit: [FOR SALE] - 67-72 A body drum brake hubs $30 shipped

I see them on B body and C bodies sites as well. I think I read the E body and B body front brake setup might have been the same (the Dr. Diff listing seems to make it sound like all the 73+ stuff was the same), so wonder if a set of these might be the ticket. Would still have to find a rotor that would fit over them and still work with the stock calipers though. Wonder if I'd have to turn down the hubs just a tad to make it all work. That or space the calipers out just a bit.