First idea is that they will be expensive.

Second idea is that to find somebody who will do bronze castings will be difficult.

I had the problem with my Lotus 9.2. The tin or nickel or whatever had leached out of the castings making the strap part of them brittle, break and become unuseable.

My solution was to fabricate new pintles from stainless steel. How long they will last remains to be seen.

Thanks Phil, I was hoping the that would be the case. I'll check it out.