I've had some parts hanging around since I renovated my 1989 GT. I have a pair of front springs by B+G, #40109, never used: 12" high, 5.25" diameter. $50 plus shipping.
I've also got two unused MAzda 323 GT brake discs BF68.26.251, possibly 251A. I don't remember with certainty if these are for the front or the rear of my GT. Perhaps one can tell by the Bradi part number shown on the pic. They are a hair over 8" diameter. $40 for both plus shipping. I believe that they also fit the GTX. Better check, though.
I'll send pics of both the springs and the brake rotors to those interested.
When I finally clear out my shop, I'll put some more parts on sale.
Larry newman
1988 GTX
1989 GT
both sold 12+ years ago