You know the item is out of your seller's hands and is moving.
Yes, there have been shipping delays.
Are you using a US address? You are currently on eBayCANADA.
Do you have a Customs number? Have you called US Customs?
Will the item be delivered by USPS? Have you stopped in at your local Post Office (better than a voice on the phone) and talked to the Postmaster?
While eBay has a very short deadline for Disputes, Paypal allows six months (180 days).
And if you back your PP account with a credit card, you are also covered by the card's chargeback policy.
Patience seems to be the word here.