Hey, guys I don't usually post here but I do have a mustang and I work at Bill Currie in parts, and sadly yes, you wont be able to get interior and trim for fox bodies, (trust me I looked for stuff for my 84). On top of that, we are one of the only dealers around here that can look for anything as far back as 1980, but that far back, parts are limited. Usually powertrain and other mechanical parts are available for a good while, also common parts on the more popular cars, (i. e., mustangs, f-150's, tec). Good look on interior before 2000 though, On another note, I do the same as Modman(son't mean to thread jack or anything like that), if you guys need anything see me at the front parts counter at Currie, I am Xavier, I will give my same discount, and can talk to John in accessories to get employee price on the Steeda stuff. Have fun at the job, I know I like mine!, X