If you are within the 45 day time frame then file a claim with paypal. You should win since it was delivered to a different zip code. There could be an issue since it was originally dlvd to the proper address and returned to sender. I would think you could get on the phone with them and explain.
If you're over 45 days (sounds like your awful close) then you're probably out of luck.
Edit: you are past 45 days. Unless you paid with a cc you are SOL. Never let anyone string you past the proper time frame for filing.