was the bending done with the wood block method or something similar ? or with a tube bending machine ? Is the tubing steel and where can you buy that tubing ? I think your bike and its craftsmenship is top of the line.
this is how i bend thin wall tubing 1/32 start with a pic 30in long weld a end cap on one end fill it up water now weld a cap on now you have a tube with water in. its time to put it in the freezer abount a day. i use a conduit bender that i reworked to fit in the vise to hold it i get the 1 in thin wall tubing at the scarp yard they have new drops