Wet And Chilly Chips, has been making a reservoir that looks like a reserator for a few years now. It is not a setup like a reserator, no pumps, tubing etc. It is just a reservoir that actively aids in the cooling of the system by being constructed of aluminum and being finned outside and ribbed inside.
I have wanted one for awhile, but they have no US sales partner. Well I finally got a shop in UK to sell me one. Yes it cost me a bit and I waited a long time for delivery, but its well worth it. I got the older one that has only 1 in and 1 out. They have new ones with 2 each in/out for these ultra high flow systems.
I am now ready to start the duallie watercooling project. The case (which is as big as a double wide trailer) blocks , pump and tubing have been in and I was just waiting for this gem to complete it.
Their website http://www.wetandchillychips.co.uk/