Replacement is the ongoing problem, not regular service
It's not that bad, DP.
Fox is no longer manufacturing the pull-shock that recent Razorbacks were designed around. Their safety stock of new pull-shocks will run out soon - almost certainly by the end of this year. While WWCS/K2 Bike still has a limited quantity of these shocks in service parts inventory, they won't last forever, either.
However, if there isn't any structural damage to the pull-shock specific parts of one of these shocks, Fox should continue to be able to service it well into the future. As I understand it, the basic rebuild parts are common to most of the other Float shocks.
While Fox has a video and .pdf file showing how to perform basic air sleeve maintenance on a Float shock on their website, it does not show or mention any pull-shock specific details. When my Razorback's Fox pull-shock requires service, I'm sending it back to Fox, instead of taking the chance I might screw something up that can't be fixed.
Best Regards,
T.K. Malone
K2 Bike