Definitely do a search on the process. Depending on what happened, and how you want to proceed with the repair, you might be able to do it yourself without too much labor involved. Since you broke it by the wheel, I have seen people disassemble the cup by the diff and not have to take the diff apart.

Search in isuzu tech and you will find some info though

1992 Isuzu Rodeo 2WD (some assembly required). "If it doesn't fit....Force it!! If it breaks, it needed to be replaced anyway."