Hvac Box For 1974

Mine is in desperate need of repair or replacement, previous owner cut the round ducts out and fiberglassed vents into it? Was hoping someone could tell me possible years fitment, or has one they'd sell me. I'm in Michigan will travel or pay for shipping. Thanks guys

1974 CJ5
304, T15, D20

 

‘72-‘75 for sure and iirc ‘76 and early ‘77 used the same one despite the major body change in ‘76. The later style had the fan motor protruding through the firewall into the engine compartment and the Intermediate style protruded under the dash behind the glove box.
I’d suggest putting an ad in the classifieds.