aspinwing,
I've got a DC headset for helos but also do a bit of fixed wing flying.
I priced a commercially available adaptor lead only to find it was going to cost about $180 Aust to go from the NATO helo plug to the 2-pronged FW thing. Seems a ridiculous price for a couple of bits of wire and 3 plugs, but I guess aviation components are always costly.
Was your adaptor plug much cheaper than that?
I can use a soldering iron after a fashion, so if I could get hold of the bits I'd be happy to make one up.
Where did you get yours, if I may ask?