Been there. There are precision stripped screw extractors on Amazon that work great! I got these ones https://www.amazon.com/gp/aw/d/B000JCT3W0/

There aren't a lot of ways to remove these without damaging the surrounding case.

They make specialty screw extractors that don't require you to drill, cut, or otherwise damage the screw and surrounding material, but they're $40 on amazon. https://www.amazon.com/gp/product/B000JCT3W0/