YO Click you can get a rear end from the junk yard(If you have one around)
A rear end is easy to replace dont sweet it. Depending where your at it shouldnt be more than $150. I think you have a 12 bolt right? That is a very common rear end.

Need help just get a hold of me and Ill give you a step by step if you like.
Maybe an hour and a half job. NO PROBLEM