The engineering term is re-banding
so if you search using that term you will have more success.
I am yet to find some one to rebnd my 2 deceased clutch drums
They look at it and either say no or quote better than twice a NOS one will cost .
Another project for when I acquire the skills to do it .
Ah Ha! I was just about to ask you Mark. I've got this 17T x 1/4" gearbox sprocket for my B30 which needs to have 19T. The blanks are cheap but I haven't found anyone yet who performs the "re-banding". If it's something you can do, I'll clean it up and post it up to you.
The field stand arrived yesterday and looks very nice.
OK Mark, but I've also just realized that the boss is 1 5/8" diam. Can you turn that down to 1 9/16" also. The fun of building a rare bike with some of the wrong parts that are passed on. If so I'll post it up to the church....Bless you my son!
The ones I've done I machine off the teeth, then turn a small chamfer on each side, bore out the donor sprocket to be a press fit over the original and then tig weld around both sides...The fiddly bit can be holding the donor sprocket blank to bore it out if a lathe is used....Not so difficult on a mill with a flat sprocket....Ian