I am a bit confused by this statement in your question
I am fairly sure that I will have trouble finding replacements for either of them (transformers).
Any information would be great.
A number of Hallicrafters receivers were built in Chicago, largely using Chicago or Midwest component manufacturers.
Many of these companies still exist or have been acquired / merged over the past 60 years.
There are also a number of Antique Radio Receiver (1920s - 1950s) Restorers across the United States ...
this is actually a separate hobby and interest area. 500 members in the Chicago area club.http://www.antique-radios.org/
HERE is a very good web site for restorers to post Wanted items !http://www.antiqueradios.com/forums/viewtopic.php?t=149473&sid=97d15d6806c1f33c3dd0166bc0dc183f
You have a group for Iowa, Minnesota, Nebraska and Dakotas http://www.northlandantiqueradioclub.com/
They will have a Radio Auction in Cedar Rapids, IA on May 7th !http://www.wearsauctioneering.com/CedarRapidsAuction.11-0507.html
Tom, W8JI has a nice photo of his Hammerlund HQ-120-Xhttp://www.w8ji.com/boatanchors.htm
There are still a large number of transformer manufacturers in this Great Lakes region.
The specificaitons for the transformers can be found in the manuals and
by reading the electrical schematics (both readily available).
IF you have the original transformers (failed or bad)
you can ship these transformers with the specifications to:
Heyboer Transformers Inc
17382 Hayes St.
Grand Haven, Michigan 49417
Phone: (616) 842-5830
Fax: (616) 842-3731http://heyboertransformers.com/
Heyboer normally charges $75 to $125 for winding a new transformer
to your form factor / size.
While this may seem like a sizable $$ investment -- restorers appreciate the service --
and the USA is not building new thermionic receivers like this anymore :-)
The guitar amplifier / musician industry regularly uses these services from Heyboer and other
firms - such as Sun Transformers in southern IL.