[Eliot Ness]

.....But I found the primary of the main transformer is open........Are there replacements (PN 32-7381)?

I think there are two different transformers being discussed here.  Morzh is referring to an output transformer and I think you might be referring to the power transformer.  It might be a good idea to clarify exactly which transformer you're looking for.  PN 32-7381 is the power transformer.