I think adding your model and year or better yet a pic of the area will really help folks answer more accurately.
Any chance this might be freeze related?
As far as if it's the shur flo water inlet regulator a piece of 1/2" X 3" plastic pipe and a female garden hose to female 1/2" pipe can rig a temp connection.
If it's PEX time several versions of PEX fittings exist that do not require the fancy crimping tools. Flair-It, Pexlock, Sea Tech etc and a bit of luck.
But model info and pics is most helpful.
2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Carslile Actuator, Equal-i-zer, Dill TPMS. Campfire cook.