You can still get Carrera struts and coilovers directly from Carrera. I know this cause I have to replace a part. (my fault not a faulty part) When I got my coilovers from SPS they said Carrera can make custom spring rates and valve the dampers to your liking.
Tom Visit SPOC National at http://www.spocnational.org Don't forget to update your Profile in the Owners Database.
