Thousands of years ago, it was standard operating procedure to disassemble CV shafts, to clean and inspect the guts, and then cram a new boot or two onto the shaft. No one does this any more, because "rebuilt" shafts became cheaper than a pair of boots and the labor needed.
Side Story: A guy from my hometown made money in the 1980s by having ball bearings made a few thousandths larger than the OEM balls in the CV shafts of popular vehicles. Worn CV shafts could be "rebuilt" using these slightly-oversize balls to take up the clearance caused by zillions of miles of wear. You'd buy the boot and clamps, and his "ball kit" for the vehicle, and have at it.
I have been told that the hubs on my 4WD Trailblazer are exactly the same as the hubs on 2WD Trailblazers. The 4WD versions get a CV shaft (outer joint, anyway) run through them, with the big nut on the end that gets torqued to a billion foot pounds. And you'd think that holds the bearings together. But the 2WD version uses the same hub and bearings, but with no CV shaft, no big nut, no torque.
Go figure.
