Used Progressive Monotube Fork Cartridges. These were installed for less than a week in a customers bike and then returned. $269 with free shipping in the lower 48

Progressive's front fork cartridge kit converts dual damper rod, and damper rod/cartridge forks to true high-performance monotube cartridge forks! This kit contains a pair of high-performance, gas charged Mono-tube fork cartridges complete with a set of Progressive's famous fork springs and is a direct internal component replacement. No modification of any kind are required to install these in your forks. Just remove the old internals, plug in the Progressive cartridge kit and you're ready to go.

• Complete fork internal replacement kit
• Improved resistance to front brake dive
• Improved front end stability and cornering
• Improved bottoming control
• Comes with all required hardware and installation instructions
• Limited lifetime manufacturer's warranty