You should be able to use an EZ Out (available at Sears or other tool store) to remove the stripped bolts, hit them with some WD-40 or equivalent first. Then find some better quality replacement bolts and/or buy a set of replacement pads that include new bolts. Hopefully that will do it, I've stripped a few of those out myself.
replace the tiny bolts with a keeper. looks like a tiny shepherds crook. Avaialable at a decent hardware store. See L Zinns article about same on Velonews.
I wondered about that being an option thanks for the idea.
I just replaced those stock cartridges with a full set of SwissStop FlashPro's and they are 200% better brakers. I have red ones (for aluminum rims). Check the webpage for a list of their options. Best rim brake pads I have EVER used. $75 per set however.
Ill look them up! thanks!