hpfp replacement options, fass fuel sytem? asap!!

[undesputedking]

i put this in the 911 section because my truck is going back together in the morning, unless i call mechanic and delay. ive gotta 2008 6.4l f350, complete failure, bent rods, all 3 gears destroyed, holes in pistons, bend valves, you get the picture, mechanic thinks, fuel pump locked up, motor jumped timing then went to hell, anyways it doesent matter. i bought a used motor. already bought arp studs, head gaskets, egr delete, complete 4" turbo-back complete delete exhaust and sct livewire. the replacement motor, the fuel pump is good but it is used and im worried that the same thing could happen to it, after all the money and work thats going into it, i would like to do something about it but ive already spent a ton of money, is there a rebuild kit for the factory pump, if not what are my options for replacement, or is $1,000 the cheapest they come?
please help

[undesputedking]

forgot to add this - will adding a fass or air dog system to the rail help keep the factory hpfp from going out?