Using mustang rotors for 4.5" bc
I can't remember his price but to a capable machinist it would be a walk in the park hence me thinking he was milking a niche market. Fair enough i guess
There's great buying for the combined hub,disc from Rockauto and others to get you started.
Most people thinking about this mod are likely to have a Kelsey Hayes for the machinist to reference anyway which is always easier