Really not my thing, but there are ways to measure transformers to get the specs. Maybe somebody will know and respond to this or one of your other threads...
Shouldn't be hard to find on the net. I barely remember this stuff from school. Part of it was measuring the resistance of the windings. You already know the impedance you are trying to match, seems like just some math.
Might try Digikey or Mouser, might have your part, or atleast point you to some specs. Email the Sales Department, if you need quantities, I'm sure they would help do the work.