Welcome aboard! I don't think the Progressive springs were stock units. Others will have better info on that. In the mean time, take a moment to edit your profile signature line with the bike details. This helps us help you.
Take a peek in the WIKI I link below, as it is chock full of great information. Best of all, there are free downloads of the Factory Service Manuals, and be sure to get the addendum for the year you have.
Joel in the Couve