diff noise when coasting need parts & specs

[cogo86]

hi guys i have a vz ss ute unfortunatly i had to have the exhaust quietened down recently which un covered a wining / knocking noise coming from the diff are i checked all the basics every thing seems to be fine except it has too much tail shaft free play im told this is a sign the diff nedds reconditioning being a plant mechanic myself i want to do the rebuild myself my question being does any body know who sells kits for them and where i could get the specs any help would be greatly appreciated cheers.

[cogo86]

any body help would be much appreciated