As someone who just broke this. Found this thread, and saw that there was no answer I thought I’d share.
First the broken Y-valve in question is just a 1/2in T with a 5/16 split. You can buy brass or plastic ones on Amazon for like $8, buy pinch crimps too.
I tried this and it’s so tight I cut out too much for everything to connect. So be careful, would definitely recommend using a razor to split it and pull to save tube.
If you want the actual part, its base is 9G291. However the actual part will be something like Ford 1L5Z-9G291-CA Tube Assembly - Fuel. The other numbers come from your truck’s engine, year, and if you’re buying the part with fuel lines. Dont buy it with fuel lines, if you can. The parts with fuel lines run $400, while without it’s like $100.
Lastly something to keep in mind, this part is like 52in long since it runs from up by your fuel filter all the way to evap can by your spare tire. So shipping can cost an arm and a leg. Just call a few local dealers, and actually call a few because they’ll give different prices. Plus you save shipping.