How about using a belt driven pump? This one is good for approx 2160 lt/hr @ 100psi (10.5 US Gallons
Per Minute is 8 UK GPM) with a rail pressure up to 150psi

http://www.stevemorrisengines.com/st...fuel-pump.html

http://www.magnafuel.com/products/efi/pumps/MP-4203.htm

But maybe a bit overkill? I think the smallest belt driven one the do works out at approx 1080 ltr/hour (UK)

Or they do some electric pumps for 2500+bhp engines but can’t find flow info for the electric ones on their site:
http://www.magnafuel.com/products/efi/pumps/index.htm