1994 Infiniti G20 CV axle

Transmission problem
1994 Infiniti G20 96000 miles

while checking something else, found both front CV boot broken and grease leaking. Appears to be recent. No obvious abnormal-no driving noise or jerking. Quesiton: should I repack the joint and repalce the boots only or replace the whole thing-CV axle (over $600 estimate). Are there shops doing repacking; Where to find cheap part of CV axle if necessary, given that the car is old. Thanks!