In your case just replace the boot. 19-5025 All Balls Racing You have to pull the axle and educate yourself on how to do that plus how to change the boot once the axle is out. A large vise and large hammer are your friends and do not be shy with the hammer!
LHS rear inner boot blew on my way to going shooting on paved asphalt on my way to the sporting clay field
doing almost 55-58 MPH puff of smoke thought i lost oil long story short it was the grease from the axle on the exhaust . Do you rebuild the axle or upgrade and do both any thoughts are welcome and BTW MERRY CHRISTMAS