fletcher, steel and tube nz, nz steel are the mains
- check your local though theres always an engineering firm that could sell you lengths, check your scrap merchant, exhaust shops are a good place to go for thin wall tube, they allways have bends and cut outs in the scrap bin.
Those suzuki motors are a rare find, at that cheap price
one of the 250er motors would be mean on a minibike,
then again he only wants 250 for the 550 and 350 combined!
what im saying is you might want to take it while its there and work around the motor, depends he might only want 50 or 100 for one of those 185'cc motors and if ya have the dosh, i would take one..
Cheers, Cam.