G-Flex and Brass
After weeks of unsucessfully trying to find someone to fabricate a pair of end caps for me, and I having no metal working skills, I decided to try and do what I know and it worked great!
I cut the top of the cap from a .015" sheet of brass, and the sides from .025". I then taped them together and laid a heavy fillet on the inside edge with West System G-Flex and High Density Filler. After curing I laid 6oz. cloth on the inside, and more G-Flex.
Time will tell, but they won't break apart in my hands and have stood up to the torture of grinding and installation. (I had to bend them a bit while installing to get the fit just right.)
I'll be sure and post if they ever break apart, but I think they are just as strong, if not stronger, than a professional brazing job.
Pictures attached