I had a similar problem. It all happened in less than half a mile though. Valentines day I was going to meet my wife at a restaurant, going down the freeway at about 55. I had a half a tank of fuel. I glanced at the fuel gauge for some reason and saw the needle moving toward the E - fast. Then people started passing me yelling that I was dumping some fluid out the *** end of the truck. I looked behind me and there was a trail of puddles as far as I could see. Luckily I had enough fuel to get to the shoulder and the truck died. Out of fuel. Looking underneath it looked like the fuel was coming from up above the front axle. I couldn't figure it out, but I took it to the tech and he said that there is a custom hose going into the fuel filter. It must have went bad and the last guy to own it went to Home Depot and spliced together air conditioning hose and a few plastic elbows to make it work - in the short term. That jerry rigged mess had ruptured. It wasn't that bad to replace the hose - special order - and change the fuel filter. Hope its more like my experience than 2 grand.
'08 CRD 3.0, Overland, Grey, 70k miles, QDII, GDE Hot tune, black gasket intake, OME Medium Duty lift, BFG All Terrains 265/70 R17, 1.5" SpiderTrax, 4XGuard Sliders, DPF delete and Resonator about to get installed.