What I have always loved and yes it is old school and I have had tons of comments on was the old style Pioneer tune speakers. To keep it simple a set in the front and a pair of 6x9s in the rear and your good to go no cutting or buying new panels. And just double sided tape for installation.
Only problem is getting a set. I bought a pair off ebay and the last pair I found at a swap meet for $10 bucks.
They tuck away really nice and are adjustable...everyone had a set of these LOL
AL
I have been into car stereo since the 70's and have never heard of the speakers you're referring to. Do you have any pictures of them? How good do they sound, especially if they've been sitting on a shelf in somebodies garage for 30 + years?