fuel line from gas tank help

[Jvan]

The metal fuel line from the tank to the inside fuel lines has started to leak. The factory instruction require dropping the rear sub frame as well fuel tank/exhaust as well as many other parts. I've checked w/ many mechanics and the cost is too high. I had this problem w/other SVX while on the road and local mechanic was able to lower tank enough to snake high strength rubber fuel line over tank and connect to fuel pump/inside fuel lines. Looks like I need to do this myself, so can anyone offer some advice? How is the metal line connected (w/clamps-threaded nuts), what length/diameter hose do I need (I'd like to use flexible hose covered w/stainless steel or other protected lines but these use ANA connectors). Any info to help purchase the appropriate hose/connectors is welcome.