I did the hose clamp thing on my stock CVs when I put my first lift on a couple years ago. It worked for a while, but the boots shredded after a few months. I drove it dry with virtually no CV boots for a year and still didn't break an axle - through snow and off road even!
If you do use clamps, I would just put regular ones over the stock clamps (unless you can find a good way to remove the stock clamps without tearing the boots). Be careful not to put the adjustment screws on the new clamps too close to the walls of the boots or it will tear into them (that's why my boots shredded).
I found some Superior brand CVs for $89.00 at 4WP and they're holding up very well (for well over a year now).