Derek,
This may help
Here are some links to two Jeep parts stockists/manufacturers here in Australia;
http://www.richardmilitaryparts.com.au/
http://www.mvspares.com/
I am sure that you have come across their wares before.
Both Richard and Darcy sell through most US Jeep parts vendors including the owner of 'the other forum'.
With regard to Ford engine blocks, prior to purchasing a replacement Ford engine block, my advice is, make sure that you make the deal subject to crack (non destructive) testing by a reputable engine rebuilder. Unfortunately the Ford (not Wilson block) engine blocks are not as robust as the Willys engine block and are prone to cracking on the fire deck. Keep us posted on your restoration progress.
Cheers
John Wilson