The comparisons are really interesting, but from a legal point, very pointless..
It really doesn't matter whether AA has the original plugs that the parts
were made from.. Even if he was the original Sculpter (which he wasn't) the
Copyright law will not come to his rescue.. Why?
AA has always taken the stance that lucas didn't have a contract with him,
but admits that he supplied Lucas with the countless Stormtrooper costumes
for the movie, clearly making this a "Work for Hire" case, in which the Employer
(George Lucas) becomes the Author of that work entitling him to all Copyright
Laws.. AA could be considered a Coauthor of the work if any legal documents
were drawn up with his signature, but I doubt that's the case here..
One could even argue that Brian Muir the original Sculptor has Copyrights
because he's the original artist, but because he worked for Lucas at the time
anything he created is classified a "Work for Hire" making Lucas the Author of
the work unless so stated in contracts..
AA can argue to the courts that he is the original creator all day long..
I don't believe he has much of a chance in this matter..