I'm making sort of a modern version of a TZ350. It's built around a modified RD350 frame with shee engine, TZ bodywork and lots of modern bits (dual front discs, hydraulic clutch, modern shocks, etc). And I'm located in Austin, TX.
Fwiw, I have a peculiar sickness that makes this appropriate for me, but it's not the ideal frame for a road-going banshee. For about the same money you could drop a shee engine into an RS250 chassis, and in fact you wouldn't even have to weld anything (the Two Stroke Shop makes bolt-on bracketry for the purpose). An RS250, or even a Ninja, would handle the power wayyy better than an RD or TZ frame would.
But that's a little beside the point. Why, do you have a similar illness?