Fueling & Injection - 10AN fitting for LS7 oem fuel line?

does anyone make a 10an snap on fitting for connecting to a stock C6 z06/LS7 fuel feed line?

all I am finding is 6an, my fuel system is 10an, maybe I can just get a 10an-6an adapter?

Why do you need a -10 off the small outlet? -6 male is all that is made. There is a -8 female fitting.