NopeI can't image that fuel line would be hard to source or in short supply. Nothing special about the LMTV lines, as you know.
There are a half dozen hose shops where I live and I have them made all the time.
Few extra fittings and parker push low line and cut and fit any fuel, hydraulic, transmission if need be and even air lines in a pinch. Not supposed to use them for air but it will hold as a temporary repair.