I believe there are wheels hoops out there that have the chrysler sizing for the drop.
I found the info
There are 15x10's available in the following drops from Carlisle Wheel in paramount. they usually sell by the pallet.
312mm = 12.28"
320mm = 12.59"
337mm = 13.26"
Nice work... I'd love to have a lathe where I could spin up wheels.