I recently had the opportunity to use JB Weld SteelStik.
Worked great at reinforcing the webs of a pivot on my train car.
It comes as a puddy you mix once cut off to the amount you need. It has about a 5 minute working time so you can mold it before it sets.
This is tough stuff once hardened and is machinable.
I bought some small, stainless steel spatulas to work it with off Amazon.
I think it would work in your case if you can figure out how to hold the tabs in position once the epoxy is applied.