I'm running a Meziere electric water pump.
Do a search, using keywords "electric", "water", and "pump".
You'll see that the most frequently used brand is Meziere.
So far, I've been running mine for 4 months, with no problems.
Is it worth it? I think so, because it has the same output, no matter the rpm. A belt-driven water pump, on the other hand, has too low an output at low rpm, and too high an output at high rpm. Also, it frees up a little bit of horsepower (5? 10?).