I have a few of the ebony pieces with the slots cut and can supply a piece of 1/8 brass for someone
able to work the brass with a dremel tool. I use a metal cutoff blade. First I grind the ends round and then,
I am able to grind a 14 inch radius then lightly file. Next use 220 - 320 - 400 - 600 grit and finally polish
with 1000 then 2000 grit.
The stud spacing in mine are 2 7/8 - You may have to drill the stud holes out a little but I think
most are pretty much a standard size. PM me if you need one.