The best way is to use OE get some from a specialty rebuilder or alternately rebuild your own. I am in the middle of some right now I will post pics tonight or tomorrow.
Sometimes I use a couple of rust free used ones I get for cheap from down south to make one good CV axle. Some rare one like the ones I am doing now you take what you can get, blast the parts and get the shaft powder coated.
New ones regardless of which store you buy them from are cheap Chinese junk unless they are OE or from an OE manufacturer.
Rebuilt ones generally suck unless they use new joints or good used ones that have not been ground, once they have been ground the hardness is gone and the joint will wear much faster.
This is how I redo them. Start with a used axle(s), disassemble it, clean it and check all the parts. On this particular one it is rare and expensive, new is over $500 and remans are horrible, Chinese new is junk, the axle shaft is too thin, the boots neoprene and cheap bearings in the tripod.
The original has a very thick and fully hardened axle shaft, it is heavy duty, the OE powder coat was flaking so I bead blasted it and had it powder coated it was only $10 local. I already started putting it back together with the tripod and retaining clip and inner boot.
These are all the parts ready to reassemble.
The joints were all disassembled cleaned, bearing clearance and raceway channel size checked then bead blasted and coated with zinc chromate primer and epoxy paint.
I will finish putting it together tonight, just repack the needle bearings and fill the joints before clamping it up.
This is well withing the abilities of the average DIY, it just takes a little patience. You also learn a lot and meet some cool people like the guy that does the powder coating, I will be taking a lot more to him. You end up with a nice part that will last as long as the original.
The inner joint on this one was shot so I got one from a another axle that was perfect but had a bad outer joint. The shafts for this one are scarce so recoating them and keeping them in service is always a good thing.
The boots are a bit on the pricey side for this particular one but are composite and OE manufacturer. The inner one take a metal insert also.
The nice thing about DIY is you can take your time to make it any quality level you want from something like this for a daily drive to much nicer for a show car or full restoration.
In that case I would turn the shaft and outer joint in a lathe to remove any slight pitting before coating and smooth out the rear joint housing.
