Does anyone know where to get a new fuel filler tee from, its the tee that attaches to the filler neck, couldn't see any at MSA or Black dragon.

Not sure if you found one yet, but perhaps try placing a "wanted" ad in the classifieds on this site. I've had some luck there.

You don't specify year model, but I picked off a P/N from the online catalog and got a hit with Courtesy Parts - US$8.52. It is called a joint tube (no joke).

Jim