Hi Paul
I think I know what you are talking about, in some of the shows you will see Bob & Rick use a thick set of wreches about 1/2" thick ,I think they had them made for them out of aircraft alum. stock you may want to drop a PM or email to Rick and ask him for sure and see if they are going to sell them but I don't think so.
If you have a metal band saw you can make a set, the flat alum stock you can buy off the net. (eBay)
You can also used a wood band saw with a metal cutting blade and run it at slow speed to make a set.
Bj
