Pre-ordering didn't involve transfer of funds.
The preorder process simply involved giving name, address, and quantity. Then they would whip up an escrow agreement and a deposit would be held in escrow. That second part hasn't taken place, so nobody needs to do a chargeback.
My absolute best guess is that if someone did pre-order they have allready done a chargeback(hopefully they paid with some form of chargeback capable method)
So you and ttul together in this? You respond as if you are running this vapourware product. Again, he requested pre-order deposit to book a unit but Im pretty sure he got no takers on this piece of vapourware by-product since alot more people would have come here to post about their funds still held up in escrow or something.