A/C evaporator core for DEALER installed, NOT FACTORY installed air conditioning on a 1987 Ford Bronco II 4X4 2.9l

Question

I am looking for a A/C evaporator core for DEALER installed, NOT FACTORY installed air conditioning on a 1987 Ford Bronco II 4X4 2.9L.
I seem to only be able to find the evaporator for the Factory a/c.  I have a part number from Ready-Aire, 6107N.  Can you help me locate this part?
Thank you!