Trying to locate the following to repair/replace.

Trying to locate the following to repair/replace HVAC in vehicle:
a) A/C Heat Control panel & A/C Heat Switch
b) Blend Door Motor
Also needed the Heater core, but I did manage to find that on the Internet.
Also can Chrysler 5th Avenue parts be used as a substitute if I am unable to find any replacements?

Thank you. Already searched Internet on-line salvage companies and e-Bay as well as auto part stores with "Mopar" offerings.