Has your fork been serviced? That is a really quite nice fork and a replacement will cost much, much more than a proper service. You can send the fork directly to Fox https://www.ridefox.com/service.php?...=topnavservice for $175 for a complete rebuild. While their lead times can be annoying, they can restore your fork to factory performance.

If your fork has an OD2 steerer, you can run any normal tapered fork with a 11/8 upper steerer by replacing the upper headset assembly.

But seriously, service your fork. It's at least $400 to replace.