So you just stripped or otherwise mangled the threads on the lug? No biggie, a replacement's around $3. Just tap the old one out (they come through from behind), slide the new one in and put some washers on or a 1" segment of pipe on the outside, thread the lug nut on and tighten up to about 70 ft lbs., back it off and then repeat. After you reinstall, retorque the lugs after the first couple drives.
I believe you're after part number: 90942-02049 MSRP $3.20
You didn't actually BREAK the lug, did you? If so you need to inspect other components for damage such as warping... takes a lot of torque to break one even if it's under an uneven load.