Not sure if you have these over there, but I used a pair of springs off a 80s-90s K car derivative. Mine specifically were off a Shadow or Daytona.

There used to be a guy who posted them in the for sale section here on Moparts.

Good luck!

Faster, Faster until the thrill of speed overcomes the fear of death...

71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater