Just the boot can be changed

Moog has polyurethane boots, might last longer than rubber.
I have no experience with them. Mine have been on for over 15 years.

There is no reason to compress the spring when removing the lower control arm. The spring and shock are attached to the UPPER ARM.  Just leave the shock bolted in place and it will contain the spring so the upper arm cannot drop down.

If doing this on a two post lift, there will be challenges. You need to have the car barely off the ground, then support the lower control arm with a jack so the strut rod and sway bar link can be removed. Taking those two off the control arm mounts will allow easier movement of the lower control arm. Just don’t lift so far that you unload the car frame from the lift. You only need enough rise to get the sway bar and strut rod loose. You MUST jack both LCA at the same time or you will be fighting the sway bar. I find it easier to just remove the sway bar links with the car sitting on its wheels before putting it on the lift.

Replacement boots will not be anything like the original boots on the lower ball joints. It is better in my opinion to just replace the entire lower arm.  Be sure to only grease them enough so you barely see movement in the boot. Lots of times they get overfilled and balooned out until they burst.  I do agree with you that some do not last very long on their own, but overfilling is a death sentence.

Bottom line: The lower control arm can be easily replaced without touching the spring, upper control arm or shock. The spindle can still be hanging from the upper ball joint or you can even replace the upper ball joint with the upper control arm still attached to the shock, held securely to the car.  The spring must only be dealt with if removing the spring perch or the upper control arm.

MS wrote:

There is no reason to compress the spring when removing the lower control arm. The spring and shock are attached to the UPPER ARM. Just leave the shock bolted in place and it will contain the spring so the upper arm cannot drop down.

I did this exact thing in 1987 when I swapped out the lower control arms. I got the lower control arms off and my wife called me for dinner. After dinner I went out and the left front spring had exploded from underneath the car because the bottom shock mount ripped off of the shock.

Use something to hold the upper control arm.
 

Nos681 wrote:

Don’t use a pickle fork to separate.

Agree, I had always used the pickle fork, sometimes cutting the boot, sometime not.  Then, I was advised to use a hammer held on one side of spindle by the ball-joint, and another to hit the spindle on the other side.  This may take a few hits for the ball-joint to fall out, but won't result in a torn boot.
 

Thanks for all tips , then , yes i got tools and removal or at least create one .
Thanks guys !