Sadly it is highly unlikely you are going to find NOS replacement springs and bushings for these forks. Your best options are to 1. measure the components and remanufacture your own replacements, 2. replace with a more modern EBR fork, or Magnum MKII hydro forks if you can source them.
Keep in mind that these forks were never highly technical to begin with. Pretty much the bare minimum for shock absorption, with like a 160 lb rider in mind.