If that is the rail that leaks at the crossover on the left side, as you are sitting in the car and has the regulator on it on the right side, you can tap the ends out 1/4" pipe, and put fittings and a new line in. I used aeroquip fbm2616, 1/4 to #6 90 fittings and had them tig welded in. Make sure you get all the metal filings out of the rails with brushes like cleaning an engine. I found a used one but it leaked after installation too, once you move the o-rings they leak. No new ones around that I know of. A guy could use a later rail and rig up an external regulator, like the corvette one that is in the fuel filter. Guys have done this with straight hose fittings, blue gas pipe dope and fuel injection hose and fittings too.