Aluminum Fuel Cell/Tank crack repair

I have a 15 gallon RCI aluminum fuel cell/tank. I am having a hard time finding someone that is willing to weld the holes. Rightfully so as I wouldn't want to do it. Anyway, has anyone used JB weld or similar on a gas tank and had good luck with it? I have researched a bit but have gotten very few reviews and they were mixed. Thanks in advance for any input.

Clearly if I can round up someone to repair it. I will be going that route. Just looking for a backup plan.