looking for a complete aftermarket heater/ac assembly. cant find one for my 70 dart

64 Barracuda Rebuild of old system Classic Auto Air

You could look up this thread. This guy sent his unit to be rebuilt by Classic Auto Air. So not only do they sell new components, they also rebuild old ones.

As far as the Classic Industries catalog, I don't have a link. I just looked it up in their hard-copy catalog.

Restoration - Mopar (Main) | Original Air Group
The above is the link to the Classic Auto Air page.