Terry
I have t50 Centre only LSD (no crown and pinion) $650 (pretty sure its a 2 way out of JDM ae86 Levin)
I have Zenki Axles to suit $250 for the pair.
I can have it bubble wrapped and ready to pick up from a warehouse in adelaide.
If not, try one of the local ae86dc sponsors in QLD. I think they have a few. Might be cheaper seems you dont have to worry about shipping.