You should be able to find a used heater ,they are out there the easiest would be the round type but if it needs a core they are expensive ,The round type do not have a fresh air inlet so they will fog the windows more than the fresh air type.I also see on the link posted above to classic parts a aftermarket complete unit for 225.
Last edited by KEVINSKI; 10/31/2022 1:51 PM. Reason: More imfo