I've been looking at the KenneBell setup, for controlling voltage to the fuel pump(s).
I'm sure I can build my own for significantly less than $259/459(dual). This site has assembled units for about $160, but only 20a continuous load - 40a continuous load would be safer, to cover continuous running of 2 044 pumps...
I've found various online schematics, like this one however they seem to be for 110/120v input.
So, I'm sure there are electronic wizards on here that know what is required to adapt such a schematic for 12/14v input, with 14-15v output. 
I don't see the need for pressure switching etc, included with the Kennebell setup, I'd just like to have a steady 13.8/14v at the pumps.