Toyota Repair: today i had a flat tire and..., broken studs, wheel studs

Question
today i had a flat tire and when trying to remove the flat tire...the wrong lug nuts had been driven onto the posts and two of them broke off.
please advise which option would be most cost effective...replacing the hub with a used one,
replacing the old hub with new posts.  do you know if a '92 Corolla Toyota has pressed posts or are they driven?  
thanks...appreciate your reply ASAP...

Answer
The wheel studs are replaceable you do not need to replace the hub, the broken studs can be driven out with a hammer and new studs are then installed by putting on a spacer and tightening them until they pull through, I highly recommend having the dealer do this.