You can buy them (reich) @ sp-parts.nl, they are 30€. but they aren't as good as Bosch pumps. If you search for Bosch pumps, go to car dealers (mercedes, VW, Volvo, BMW, ...) and ask if they don't have the elec pump for the t° in the car. they use it to transport the water from radiator to "pipes" in the car.
grtz