Frankly, I don't know if these kind of requests are allowed on tpf. But I have heard of mail forwarding and auction bidding services...who bid on your behalf and then forward you the package. At a fee, of course. Perhaps you can look into services.
Good luck. Also, if you are talking about the vintage YSL from the other thread, perhaps you should try contacting the seller again. If he or she doesn't respond to you (sellers CAN make exceptions for int'l bidders) perhaps it's better just to walk away? What if down the road you realize the bag is not as described or need to return it for whatever reason? I imagine the process would be extremely complicated.