Using mustang rotors for 4.5" bc

Longgone said
Yeah Richard the seals have been elusive, so for now I used the outer Mustang seal Rtv`ed to the inner (rubber only) Mopar seal. It`s hard to find a seal with such a large o.d. and small i.d. so I`m still on the hunt. The unicast rotor/hub assembly has worked great though, I`m very happy with it.
Chicago Rawhide should have the seals you are looking for.