Found
Assuming no one will take you up on your trade request, your best bet is probably to buy the dead center row AA pair on StubHub for $350 a pop and then sell your row DDs there for $250ish. You'll still end up paying a hundred bucks or so, but no different than if you bought someone's AAs on here and gave them your DDs.
[Sorry if suggesting someone scalp their tickets is wrong, but hey, sometimes ya gotta find ways to feed the habit.]