I sent you a PM with some info on solutions I have available with a friend.
Looks like water cooling is the way to go. Expecting the cards and chassis to come in somewhere next week. Got a very detailed e-mail from EK with their products which also mention the full cover 7990's so will look into that and puzzle it together so the cards, chassis and hopefully the water cooling products arrive at the same time.
I entirely disagree - a homebuilt water cooling system for production work is asking for trouble. I have know many people who have tried water cooling for GPUs before in the password cracking realm, and all of them have gone back to air cooling due to reliability issues. The 7970s are great cards with excellent coolers on them, provided they're in a chassis that can handle their airflow and power requirements. It's hard to do this with standard builds, but we have a few options that fit this need perfectly (24/7/365 sustained high load).