Persistence pays -these people have them - http://octopart.com/info/Stancor/TTPC-9.
Take a look at the PDF file, though. The -9 part only has 4 terminals. I would want to check to see which dash number you're dealing with. I think the one with one primary and two separate secondary windings should be correct.
By the way, telco coupling transformers are only slightly less common than dirt - Mouser and Digi-Key also carry them. Just be sure of the particular one you need.
At $6.00 a pop, you can get a couple with different configurations (but with 6 pins) and find the right one by experiment.