P/N for Carb Vent Tubes

[HiImNewHere]

Would anyone know the part number for the carburetor vent tubes? I removed the carbs on my newest toy ('92 w/ 9.7k) and saw that it's missing one of the vent tubes..the longer section of rubber tubing, not the t-joint section. I'm assuming it's necessary or at least very helpful or it wouldn't be there in the first place.