Congrats Nick, that's a great plan - the electric waterpump means min. 3 hp more.
The Bosch nr. is
0 392 020 024, good luck for your project
And a word about the Diesels, since they have a much higher efficiency than a benzine engine the problem is that they don't become so warm/hot and therefore they need as an addition the electric waterpump or better an auxiliary heating.