I have leaking axle rubber boots both side. Can I have just the boots replaced?

I have no noise at all yet when turning either direction. Why does the 1/2 axle have to be replaced? Can't I just have the rubber boot replaced? Is there some kind of labor intensive process to just replacing the boot or is there something I don't understand about the axle?

rubber boot parts sometimes now a days its to hard find and to do the job done are almost the same to put new axles but its totally defends on you the owner what to be done.