cannibalize a tab.
Plastic or metal? Either way, you can make one.
That looks like a real easy fix.
Plastex.com
Cutting off a matching piece and epoxying it on is pretty easy too…haha!
It’s plastic.
Get some Plastex and you won't need to find or buy spares. You'll have this on hand for any other plastic repairs. I've had to fix crappy epoxy work.