My cv boot was also replaced when I did my timing belt a few days ago. It was starting to weep grease right where the clamp was. I got to it right before it got a chance to completely tear and liberate grease all over my suspension. If you see the boot beginning to show signs of failure, it’s best to get it replaced as soon as you realistically can. This way, you can avoid having to replace the whole joint or axle. The remanufactured units are not the same quality and if you can save you original joints and axles, it is the better way to go. If the joint has been driven on without grease, it tends to go bad quickly. Soon it will begin to make noise (most often a clicking noise when turning or backing up) and you’ll have to replace the whole setup. Many shops only replace the whole axle because it’s easier and more profitable. Find a shop that is willing to do just the boot job. It should cost around $200. Parts are cheap but the labor gets you.