If the springs are root cause and not some other part of the mechanism (cable, actuating mechanism etc.) the stock parts are # 22401-430-000. They may be available from your dealer or
http://www.westernhillshonda.com. I got a Keihin rebuild kit from Honda although you can get same of similar from importers
http://www.sudco.com. The part # and shape of the needles do not match exactly so the Sudco route requires some thought and experimentation. Email me if you want to get a manual and parts catalog plus other useful stuff. The Fox Shox you need are 17.5" in length.