Machine Mart have one that does 40litre/min but it's not cheap at £106! Their order code is 051010010 and it's a Clarke Model CFT12.If you only want very occasional use a cheaper option is a drill pump which can be used with mains or cordless drills. I got mine from Aquafax. It has to be specifically for diesel, i.e.nitrile impellor, but you prob know that. Mine was about £30 and was fine for pumping out my diesel tanks for cleaning. The connectors fit ordinary garden hose which is handy. Part no F3P10.