Just a thought, dorman sells nylon fuel line repair kits. Two barbs and a piece of fuel line. you would want to cut out a 3" section or so, put a barb in each side, then a piece of nylon of appropriate length in between the two.
With that line I wouldn't think you would lose any more gas than what is sitting in the line since it looks like it is higher than the tank. I changed my fuel filter on my 2000 sierra this weekend, and even being as low as it is, I lost very little having the line completely disconnected.
COTY - 2012
Tom - 03' Bonneville SSEi', 00' Sierra SLE, 1980 Goldwing GL1100 Interstate