I don't think its such a good idea to use the two piece boot. You will want
good access to the CV so that it can be thoroughly cleanned and re-greased.
It is not very difficult to knock the shaft out of the bearing. I would
replace both boots (only about $10 here in Australia) while I'm at it.
Best wishes
Kim W

I tried and failed to use one (couldn't find the right size), but I
did succeed in Buying a whole boot, cutting it in half, and then
gluing it back together around the joint.  It kept the joint intact
for a few years.  I wouldn't really recommend it unless you're
desperate, but if you are, it's probably a reasonable way to keep the
car on the road for a few months.

Of course, buting the whole boot isn't much more expensive (may even
be cheaper) than buying the 2-piece. THough the real reason you'd do
it is that you can put it on without taking the joint off.  I have no
idea how hard that is, but I imagine it's past the comfort zone of
most people who'd even consider a two piece boot.

Now, I've been told many times that if the boot is broken, it's a
better idea to just replace the whole joint, as the joint will probbly
have taken damage between when the boot tore and when you noticed the
problem, though the people who have told me this have all been
mechanics who had something to gain by me replacing the whole joint.

On the other hand, replacing the joint, in my experience, isn't
much more expensive than just having the boot replaced -- if you're
having a mechanic do it (The part is a lot more expensive, but the
labor is less)