2.0 firmware-what to use for Australia (S8500) topic

What Bada 2.0 firmware for a Wave S8500 should I use for one I purchased here in Australia?

Is there a offical generic one I could use or could I use a custom firmware instead

Would a generic official one just change the CSC and not affect 3G?

As Samsung don't release any 2.0 updates for the S8500.