Congratulations on your first 22 mbh. You can buy replacement vents from Weber. There’s other sites like grillparts.com, too.
The bowl is a tricky matter. That’s rough, unfortunately. The larger holes might be addressed with bolts, nuts and fender washers. I’d avoid placing coal on that side or use baskets. A bit of JB weld on the exterior smaller holes may help. Again avoid coals against it. Perhaps, a black kettle donor to transplant a section of bowl as a patch?
Cellar2full has a thread on fixing some bad damage.
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