Hi Paul,
I don't know which product was displayed at the AWS show, but I have something I purchased back in the late seventies, called Lee Pipe Patterns. The three sets I purchased came in ten combination patterns for 2" to 8" diameters, ten combination patterns for 10" to 18" diameters, and ten combination patterns for 20", 22", and 24" diameters. Each pattern is half the circumference of the pipe size, so half the marking is done on one side, and the other half from the opposite side. The patterns are made from heat resistant material, and they make 2 piece 90 degree cuts, orange peels, bull plugs, 3 piece 90's, eccentric reducers, concentric reducers, risers, saddles, "Y" connections, and 45 degree elbows. I don't know if they're still in business, but here's the contact information from the instruction sheet:
R.E. Lee Company
3819 Inca Street
Denver, Colorado, 80211
Phone: 303-455-WELD
These are Lee Pipe Patterns, for welders, fitters, and layout men
Paul, I think the product you're after is called the "pipemaster" range, where individual needles slide up and down to give you an exact shape of your cutting requirements.
Have a look at their website at http://www.pipemastertools.com/ I'd love a set of these myself but they are priced a little too steep for me.
Regards Andrew.