I have a Jabsco pump that I found on Ebay.
It says it draws about 16 Amps.
Look around some Marine stores and you can find the information you may need. The most expensive part for my set-up was assembling the discharge hose. I was able to use some old firehouse that I got from a friend but the "Leak Free" fittings were costly.
Overall the pump works well.
One draw back is that the outlet is 1" therefore it drains slower than the 3" flexible Pipe that most of us are used to using.
However I can discharge up to 100' with out a problem.
Hope this helps.