Originally Posted by Rugger_can
Such as soldering/gluing a Allen key into the damaged hole.
I'd glue/JB weld in a hex/allen key.
if it's not too deep that you can access it cleanly, take a hex key and dab a bit of JB kwik on one end, stick it into the stripped grub screw, hold until it holds on it's own and let it cure (4 minutes for JB Kwik) unscrew.
Now if that grub screw is rusted or seized, there's still a good chance that you'll break the JB weld bond but it's worth a shot before drilling it out.