Eclipse makes a 6x9 component system with a woofer that is only about 2" deep and Boston Acoustics has a 6x9 2-way with dual tweeters that is a thin mount also. Crutchfield just doesn'y carry those models. You can find them on
Car Audio Video - Car Subwoofers - Car Amplifiers and Speakers. Neither are cheap, but both are less than $200/pr on that site. If you have a Double Cab, the Boston Acoustics SX65 fit nicely in the rear doors and really add some clarity over the stock POS speakers.