Need replacement for DuMont 20D-4901-2 Vertical blocking transformer

[Resonance1]

I am trying to restore a Dumont RA-103 "doghouse" TV, and I need a new vertical blocking transformer. This model has two secondary windings. Apparently, the following would be compatible.

DuMont 20D-4901-2, crosses to:
Thordarson 26A01
Triad A96-X
Stancor A-8124
Merit A-3001

Any suggestions where I might find such a thing? Any way to use two transformers or otherwise modify the circuit? Sadly, Playthings of Past is currently "down" while the inventory is being transferred to a new owner.

Any help appreciated !