I have a recently rebuilt 2QM15 that leaks fuel at the connection to the injector. I've tightened the nut to the point where something will break if I go harder. The fuel drips from the nut when the engine is running. The bad part is I can't find a replacement pipe ( # 124070-59820 ) anywhere for it. Is the pipe any special size and would a diesel repair shop be able to make a new pipe using the old nuts, if they don't have comparable nuts ?