JB Weld can be purchased at Walmart, and at most auto parts houses at the counter, or near the adhesives.
I actually fixed mine by drilling and tapping into those areas, then using JB Weld as "lock-tite" and running in a 1" stainless bolt, then filling the rest of the indentation inside the tube with morre JB Weld.
It has held now for 3 years.