Looks like a pump from a swamp cooler. $50. $1000 is a pretty silly price for a pump and a couple of hoses. Looks like a DIY project. Ultimately running a pump from the alternator is a power losing proposition. They're no such thing as perfect energy transfer and if the pump is constant velocity it will draw more power when it's not needed. Of course, on these you'd never notice any minor power loss.
The pump has to be sized to provide enough flow to cool at max power. An electric pump can be run at that output constantly, don't need speed variance. On drag race cars pretty common except you're not running the pump from the alternator as you don't have one. It would appear from the pictures they're providing speed variance. I can see this as being readily done by taking a signal off the crank sensor and building a small circuit that would convert this to a linear output controlling a power transistor that varied current to the pump. The speed variance is trick but unnecessary if you're willing to give up a little power.
