They couldn't sell those at the Will Call and refund the money to the original buyers?
I tried that when I saw I was stuck in Duck hell.  
The only way I could buy them would be if the original owner confirmed to the ticket office they could not claim them (by giving their credit card number) and that I was authorized to purchase them in their stead.  
Or, barring that, fax permission for me to claim their tickets and pay them whatever they wanted as a side deal.  
Lengthy argument with ticket guy.  He wouldn't budge.