Remove/replace stripped hinge screws?

I accidentally stripped the T6 Torx hinge screws on my early 2009 15" MacBook Pro. Is there an easy way to get them out? I'd like to avoid taking it to a professional. They aren't completely stripped -- that is, the holes aren't pure circles yet -- but they don't hold the Torx screwdriver. Would a precision screw extractor work?

Incidentally, is it possible to buy these sorts of screws at a hardware store? I can't seem to find them at iFixit or elsewhere online (at least not without the accompanying hinges, which I don't need).