A few things:
a) McIntosh winds their own transformers.
b) McIntosh has been in business for many years, and through many ups and downs.
c) Meaning that their management at least has some basic business intelligence.
d) Suggesting that the transformers they make/made are not unique to each individual component.
e) Suggesting that it is quite likely that they may have that transformer available.

Peter Wieck
Melrose Park, PA