Need some help
 

I have a slight problem. I would like to customize my 99 mustang but all of the magazines and ads that I see offer only Bullit accessories. My style is a bit more imaginative and the import auto magazines like "Super Street" (anyone heard of it) offer what I would like to use to customize my car. Does it matter if you have a domestic or import automobile in order to buy these parts and install them? I know that it does for body kits, but what about seats, steering wheels, wheels, rear view mirrors and such? Thanks for any responses and thanks to those who responded to my previous post.