i would jsut replace the whole axle.... some people have good luck with replacing the boot, and some dont... the only way to be sure that joint has proper grease and isnt contaminated is to replace the whole unit... once the boot tears, there is no way to tell if any damage was done being run low on grease, or contaminants entering it
Axles are cheap - $50-$70 after core charge refund - from Autozone, Advance, etc. with a lifetime warranty. I use the ones from Autozone, and haven't had any issues. A buddy just got some from Advance, and they look better ...
