use one from an isb cummins,,thats what i got,,,,should be able to get one for around 50 or so,,,i did a ton of 0504replacement campaigns at work,so i have a few spares,,um i think they flow like 72gph or 96 or something,,i dont remember offhand,but its plenty,i know ido get like 15 psi at the inj.pump inlet,nice,,,even on a normal diesel,use a lift pump,,my old 1.6 jetta td used to fallflat at the strip in3rd on up,,starving for fuel,,,couldnt feel it on the street though,its a good idea to assist any bosch ve witha lift pump,, ,,i got it set for key on,,but you could make it running only,by using an oilpsi switch ,,,, mine is "quick+dirty",mounted back near where the gasser pumpwould be,,idid plumb it with nice german hose+clamps though,,,the isb pump has 12mm(ithink) banjos,,the one igot is the "same" but has pipe threads,,i put 3/8 hose barbs on them,,i got my orig pump thru work at napa,,,they have like 6 different carter pumps avalable,,,the differences are mostly hose hookup differences,but they have some with more or less flow too,,,,but find one of those carters theyare fine,,,i maytry to use one for my water to air ic,,,,but if ido,,imayhave to use coolant for lubrication for the pump,,,,theyare a vane pump,,