Asetek has released a 12V Waterchill reservoir and pump, and PimpRig has it for review.  While it may not be a top of the line performer, some of the extras that it comes with may influence your decision somewhat. 
“Odd shape or not, the reservoir is very precisely mated to the pump body over the inlet to the impeller making for a very clean look. A small tube is modeled into the back of the reservoir to accommodate a LED which is accessible from the underside of the pump. The position and size of the fill port however may make filling it a bit problematic.”

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