ok,

keeping std calipers you need 2wd cossie discs + mike rainbirds brackets.

going cossie discs + calipers you need 4x4 calipers + 2wd discs.

the first option is actually pretty good, the second is better.

if you have good condition s2 calipers i would probably go that route, but if they need recon'nig then go 4x4 calipers