The Yoda puppet is made by Gino Sabbatino.He has a forum at:
http://www.starwarspropaganda.com/
Gino can be somewhat....abrasive.He tends to divide the prop community a bit.People either really like him or cant stand him.Ady if you wanted me to ask him about that Yoda I could as I know him quite well.
He does some great work such as his trooper helmets and his busts like the Emperor and Yoda.As for being an OT purist....well yes but he has done a lot of work on replicating the Darth Maul costume so not entirely.