Hey knothead, I'd like to help and hopefully you've already got it figured out. Not knowing exactly what your asking I'm not much help and maybe why your not getting any replies. A photo would really help. If your talking about the male threads that a Female Foster quick connect screws onto it could be either BSPP or 1/8"mnpt, I've seen both. Also no idea what a mFF Tee adapter is either. As far as a supplier you can check with NuVair, Best Fitting UK or even Pyramid Air. Hope you got it going your way.
Jking