Those bolts do not torque too tight, probably 25 ft/lbs. There are torque specs for every fastener on your vehicle but most of the time these just get "tight" and mild loctite 242 (blue) can be used but its not normally needed. Sometimes you need a wrench to hold the caliper slide pin and sometimes you dont. If you knew the dimensions of the caliper pin bolt you might be able to get them from a hardware store, If you needed to go that route you could remove one from the other side.
Keep in mind, that it might have damaged wheel from the caliper lifting up into it, It may have also damaged the pads, shims and/or anti-rattle clips. If the wheel is damaged even though its cosmetic I might want them to replace it, just in case it removed a coating, paint or chrome so it doesnt rust, corrode or peel.
Keep in mind, that it might have damaged wheel from the caliper lifting up into it, It may have also damaged the pads, shims and/or anti-rattle clips. If the wheel is damaged even though its cosmetic I might want them to replace it, just in case it removed a coating, paint or chrome so it doesnt rust, corrode or peel.