I am sorry you are having this trouble, but if I were you I would buy a set from him and pay with paypal. This is the easiest way to find out who he is and where he is located, all the information you need will be located in the paypal transaction for the sale.
Take care, and I hope you find him and straighten him out!!!!!!
Good idea, and to take it one step further, you don't even have to buy the item. If you just bid on an item from an eBay seller, you then are able to request their full contact information through eBay.
Good luck.
Mr H <--- has spent a small fortune with TAR.