You can create a virtual USA address using a freight forwarder like Shipito. I suggest you to use a freight forwarder allowing to consolidate your packages. If you order a lot of items from ebay and USA online stores, you will be able to save on shipping a lot.

See also:
- Major freight forwarders for shipping packages/parcels from Amazon & other US stores
- Online shops shipping and not shipping to Shipito warehouse in Torrance, CA