Replacement "half shafts" aren't that hard to come by. EMPI makes replacements for the VX but they aren't an exact fit. They do work, though. I know Triathlete has them in his VX and has done a trip out to Moab with them.
The axles themselves (the pieces that go in the front axle housing) are a little harder to come by. I think the passenger side is readily available, but the driver side seems to be a little more scarce. I had some driver side CV issues a couple of years ago where the "green cup" got scarred and pitted due to my CV boot splitting and letting gunk get in there. I couldn't find a replacement axle and ended up having the axle taken out and sent to a shop where they welded up the checks and pits and then remachined the green cup back to spec. Hasn't given me a problem since.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless