Some companies allow you to create a P.O. box. But you will need a physical address, not a P.O. box, not an APO/FPO/DPO address.

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 to save a lot on shipping.

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