Not knowing how you are set up or how much room you have but
I would look at some electric power washers
Washer — 1700 PSI, 1.5 GPM, 120 Volt
Great for car detailing, deck maintenance and boat cleaning with the quick-couple nozzle and soap nozzle. 25 feet of high-pressure hose gives you great range. Direct-drive pump features brass manifold and ceramic plungers. Other features include 36ft. GFCI cord, thermal protector, downstream injector and 10in. pneumatic tires. 10-gauge steel-frame cart. U.S.A.
Overall Rating 4.5 out of 5 4.5 / 5
this is off there page
http://www.northerntool.com/webapp/wcs/ ... rch=157300
and the entire thing is $400.00
mind you this is for both a pump and a motor.....complete unit..
of for another 100 or so you can go bigger........
Just take the pump and motor off and mount in your truck.....
If it runs independent form other things on your machine
(once again not knowing your set up)
you could take this and mount it anywhere and just pipe over to your water souse that your pump it drawing from now.....