Is there a fix for damaged stuck screws?

Apple uses a thread-seal on the screws to prevent them from loosing up. So you do need to be careful you don't strip the heads. I've found a heavy-duty soldering iron can heat up the screw enough to soften the thread-seal for a second or two. Give that a try otherwise you'll need to try a little solvent - dampen a cotton swab (Q-Tip) with some methylene chloride and the screw it may take a bit of time to get enough to get down to the thread-seal (don't soak it!).

If that fails your last choice here is to carefully drill out the acre head and then using a pin vise remove the rest of the screw or slot the top of the screw shaft (after popping the cover off and masking off the area).