Could you take some photos and share them?The original Vibrograf plugs are proprietary, and they're both different. I actually had to make a suitable plug from scratch to fit my old B100.
For the TG, I just changed one of the cables to a standard shielded microphone cable and a ¼" mono plug connector, which then plugs into my Apogee Duet interface. The type of plug you need of course depends on what you want to plug your microphone into. Mine is an ideal scenario, since I have two separate mono 1/4" instrument inputs in my audio interface.
If your microphone has a standard 1/4" plug, all you really need is a 1/4" to 3.5mm headphone adapter to fit most sound cards.