Re:
Unfortunately ALL Pace hard springs are like rocking horse cack!
The 1997 springs can be recognised easily as they all are painted fully; yellow-soft, red-medium, blue-hard. They are progressively wound with coils closer at one end.
The 1998 springs have a rough stripe of paint on them, same colours as '97 although some of the mediums are marked with pink, also progressively wound but shorter than the '97.
The 1999/2000 Evo2/3 springs are not progressively wound, and this is where it gets tricky, there were medium and hard only, colours as before; red-medium, blue-hard, but......not all of the springs were marked!!! They are a slightly larger outer diameter than the earlier springs.
I'm not going to even try to explain the springs in the PC2 or RC40, all a right mare!
Hope that helps in the search, they do come up occasionally. I will look into getting some made also.