Re: e fuel part
Off the top of my head I can think of a couple of places to try since you'd prefer brass. Plumbing supply house, Hydraulic supply, or even like Home Depot, Lowes, etc.... Although a wye maybe a little harder to find compared to like a t fitting in brass for that size.
1997 F350 7.3 Powerstroke, 4x4, 135,400 miles, 4 1/2" up front 2" out back, 35" Kuhmo M/T's, 3" dp, 4" with no cat, K&N, Triple Auto Meter Gauges, IDM Mod, rebuilt E4OD, Beans Tunes