Originally Posted by
noodle soup
The complete rear hub can be purchased for about $230.
I would buy the complete hub, and replace it myself.
You should be able to find the freehub for less than the hub. I know I can.
Shimano Dura-Ace FH-9000 11-speed Freehub Body Unit - Modern Bike
Shimano Dura-Ace 7850, XTR M985/975/970 10/9-Speed Titanium Freehub Body Unit - AEBike.com