Sorry, you can not get new stock replacements for a Fox GT spring. The only replacements are for the 6cyl and 4 cyl stangs. The springs fit, but they are a lower rate, not progressive, and taller.
Now, the good news, AUTOMOTIVE SPRINGS DO NOT WEAR OUT!! The springs may break, but their rate and how much they "lift a car" DOES NOT CHANGE - PERIOD! As for all of the nay-sayers, WHAT DEGREE DO YOU HAVE? HOW MANY SPRING MANUFACTURES HAVE YOU WORKED WITH? HOW MANY CUSTOM SPRINGS HAVE YOU SPECIFIED?
For Stangs, the isolators compress. THAT is the reason why Stangs drop over the years. Take your 20+ year old spring, put in a new isolator, and gee, the car sits at the same height as it did when it came from the factory. I'd hope that anyone that took a Mechanical Engineering course would say - well, of course, DUH!
So, the good news is that you can get any non-modified (cut) stock GT Fox GT spring, and it'll be as good as a brand new spring would be from Ford. Of course, I suggest that you replace the isolators at the same time.
The problem is finding a 100% stock GT spring. I KNOW! Seems like many are cut, or if you get springs from the junk yard, who knows what spring is really in that car! Again, I KNOW!
If you count the coils and measure the height, you should be okay. The unsprung height WILL vary by ~1/4", but that will make NO DIFFERENCE in the final height of the car. Again, just about ALL of the BS you read on the net is that BS. It's either a very simple explanation, or just plain WRONG! Again, I'd hope that anyone that took a Mechanical Engineering course would say - well, of course, DUH!
I posted on the corral the number of coils and the height of stock springs. I forget the exact posts.
Uhm, for what car? And, what rate? Are they the same as the 425/530 lbs/in stock GT springs?
You do realize that there's no such thing as a "single Fox GT spring", don't you. That's more BS that you read on the forums and on sites. The spring that came with the Fox car was dependent on the tranny and sometimes if the car had AC. Also, if the car is a hatch, notch, or vert. And, of course, the engine (V8, V6, 4cyl).
Plus, define "stock height". As I said, a lot also depends on the isolators you have on the car. Plus, it'll now depend if you have alum heads, 3-core rad, the exact rim and the exact model and year and pressure of the tire that you have.
I find it interesting when people talk about the height/drop of their car, but then never seem to give all of the important details. And, gee, WTF do they mean by 1/2" drop? Is the fender at 27"? Or 26"? Or 300". Of course, "they" never seem to want to say what the exact measure is. And, of course, there are ways that I, and others, know they are BS-ing and repeating stuff they read.
BTW: For the OP, I found info on the "stock GT springs" (Hatch, 5-speed, AC). Those are what people commonly referred to as the "stock GT Fox springs". Cutting stock 1993 5.0 springs - Corral Forums