Sorry if this is not what you want to hear but in my experience every split boot I have used have only lasted about 2-3 months ,and I have always found it much more cost effective to change the boot for a whole one ,why do you want to change the whole cv out I would imagine from what you are saying that the joint itself is okay so just strip it down and change the rubber boot and put it back together. Sometimes the easy option gives us more grif in the long run
thanks
freeze