I'd also vote for JDM conn. I've sent several folks to him from here, and all have been pleased.

As far as rear locker, they were available from 91 on (genII style only). Seemed to be a more popular option on the v6 model - I looked long and hard for a dzl with rear locker, but ended up going with LSD, and extra low mileage...(35k kms).

RORO is a frustrating process. You can get bumped anytime by the new cars. I was booked for a couple months in a row, but finally ended up having to stuff it in a seacan. If I do it again (and I will in a few years if the 15 year rule stays around), I will go container again. And I will use jdmconnection.