Looking for a 3/8" GM fuel rail quick disconnect fitting to 3/8" fuel hose nipple. Same part for return line 5/16". Seems like such a simple part needed by anyone building their own fuel hoses (or any motor swap) anyone know where they sell them?

Summit sells a quick disconnect fitting to 10mm outlet, that doesn't help me as a 10mm male fitting to 3/8" hose barb is impossible to find.

I have my 3.8 motor's original fuel rail connecting hose and I'm trying to lengthen it with new hose, I was even thinking about trying to cut off teh hose from the stock hose to save the fitting atthe fuel rail and slipping on longer fuel hose on that. Anyone been able to do this? It looks like it is glued on there somehow.