You should contact some of the local (Melb) sponsors of this forum, in particular Dean at Volkspower.
I went through a similar exercise recently and found Volkspower a great company to deal with.
See:
http://forums.aussieveedubbers.com/viewtopic.php?tid=14591
As for reconditioned heads, the head I replaced in my Bay was "reconditioned" and failed in less than 12 months. So be very careful with reconditioned or 2nd hand stuff.
This is a big job as the engine has to come out so be prepared for a major investment unless you have the skills to do it yourself.
You should also ensure that you get the clutch and main bearing seal checked while the engine is out. Good time to check out the alternator too!
imho
Sulla
------
[ Edited on 10/5/2006 by Sulla ]