Your only alternative is to get in touch with FORD directly if the dealer is not willing to work with you. If you have it documented that you have been through four intakes you may have a case for the lemmon law. They most likely will have to fix or replace the intake. Don't let them screw you around. The squeaky wheel gets the oil! ***** every day untill they fix it. Or buy the roots blower from Ford, that will solve the whole problem and boost the HP by 60+
Good luck, sounds like you need it