Paul, guys have been water cooling their PC's for years now using the gear monoxide linked to. A basic radiator+fan setup would be ample for the heat our ST's pump out. Anything more would be overkill + unnecessarily complex. While strapping a pelt. to a radiator sounds great, the benefit you get out of it isn't worth the effort - as I said, guys have done all this on their PC's for years.. the hard work has all been done, there's no need to re-invent the wheel.
Just for interests,
these are test shots a few weeks back from my ST2000 @ -10C / 15sec., auto dark in CCDOps. Ambient was ~23C with ~80-85% cooling workload.