What?!?! That dudes in need of a Center?
I'd love to have Varejao, Howard and Hilario. And then to have Millsap and Kirilenko as PF's as well! I'm not seeing it, but I guess if he thinks he does, so be it.
I guess I don't think you really have a lot of centers you can deal, but I would keep it simple. Asik is hurting your team in FT% and you need 3's.
I'd try to trade Asik for Klay to see how interested this guy is in a Center and see if he counters with anything. Keep the expectations low though because that's not really a very attractive offer, but Asik will fit into his overall team strategy (low FT% and high TO's), so it just might work. You may even want to mention to him that Asik is a perfect fit for his team since he already has Dwight Howard.