JB Weld Steel Stick: like this

You mix the putty up like play-doh once the two parts mix they will get warm. You have about 10 minutes to mold it into the shape you want and then it will harden into a very tough material that can repair that ring.

Those holes are small enough you might be able to get away with https://www.amazon.com/J-B-Weld-8267-SteelStik-Reinforced/dp/B00RN7CT2U/

Try something like this https://www.amazon.com/J-B-Weld-8267-SteelStik-Reinforced/dp/B00RN7CT2U