beejay.. there is a guy on another forum (
Outer Limits 4x4 Board :: Index) with the username Ray185 who has put a 5spd from a 60 in his FJ and might be able to share some useful info..
Theres a 4x4 club with a large contingent of 40 owners in .vic called
3rd ROCK 4x4 Club - Australia and could help out sourcing parts.. also Matt.mcinnis off this board has been sourcing h55f's and sending them over to the US in the back of troopies..
hope this helps you on your quest.. the 3b is a solid performer.. i love mine!