Bummer! Personally, I would slap it together, take it to a reputable guy and have him (her) fix it right. While at it, I would have him remove all the other studs and replace with fresh ones. They are only .95/ea at BAV Auto, or go to your local stealer and not wait on shipping. I can not see it taking more than an hour of his time. While Jury rigging has its place, I think this could get very messy and problematic if handled incorrectly.
Good luck.
BTW any machine shop should be able to do it too!
L