Jason:
It is easy. The trick to remove the injectors is to loosen the injector hold down just a bit, but don't take off the hold down. Now, turn the engine over one second with the key, just bump the starter. The compressing will pop the injectors loose. Now, you can remove the hold-downs and the fuel rails and pull out the injectors. The real issue is more about the injector nozzle and tip. Sometimes the washer or injector round shield will remain in the head. If so, I just left my old washers and tips in there and installed the new injectors.
AS for buying new injectors, I would call the parts department at
www.HavenHarbour.com and ask for Barbara, I buy my parts via her. But any dealer can sell these.
Hayden