where can I buy air filter for transmission and price?

Air filter for your transmission??? Did you mean a transmission pan filter? That would require the trans. pan to be removed and drained,cleaned new filter attached to valvebody of trans. replace gasket (if not reusable, will come in kit with trans filter). Then finally add proper amount and type of trans. fluid road test and recheck level of a warmed up fluid.Any general repair shop should be able to handle this. The only reason i think jiffylube told you to go to ford is this car my have a special drain plug and fill procedure this type has no dipstick that's how you would know.But most shops should have equipment to preform this. If not a shop that deals only in transmission will.hope this helps The auto DracoCat