looking for roll bar mounting bracket

Looking for a 1.5" or 1.75" OD mounting bracket to attach my valentine 1 to my roll cage.

I’m going to make a sandwhich plate on the mill for the valentine, i just need the bracket to attach it to.

Anyone know a good place to source these?

If you have the capability to use a mill to make a sandwich plate, just make your own…

too much time involved for such a small piece that i’m sure i can find somewhere else for cheap