Fuel Evap issues

New to the Forum and was seeking some advise on a fueling issue. Filling the fuel tank is such a slow process. The nozzle just kicks off if I try and fill the tank at a normal rate. In past experience with another vehicle, it was a venting problem, such as a clogged canister or purge vent solenoid gone bad. My local dealer claims these parts are "discontinued" and has no parts replacement suggestions. Anyone had the same predicament and was able to resolve the issue? Any help would be much appreciated. Thanks.