Recently I sent a SVX driveshaft to "a place in Illinois".
They said that replacing staked U-Joints would not be a problem.
Their price was fair, and the turn around time was good.
However the driveshaft now had a very bad vibration.
I believe that the driveshaft has been returned to the company for them to fix it.
It will be a while before I can reinstall it again.
When I do, I will post more information.
BTW, when I, figgured out that the rebuilt driveshaft was bad I took another driveshaft to our local driveshaft rebuilders.
They would not touch it.