I've been watching this thread because Yoda, to me, represents the pinnacle of manual puppetry. I am a former puppeteer and have worked with Frank Oz a few times and I would dearly love to have one of these awesome Yoda sculpts. That being said...
I think maybe I understand some of the frustration here with Cyberman. I'd like to just butt my nose in here and try to help. What I'm picking up is that Cyberman does not want to be a vendor, does not want customers, and is not soliciting. This thread was to chronicle his work, not to sell stuff. He has agreed to make copies of his sculpt reluctantly. He's not looking for work, and I get the idea that making duplicates is a chore. Am I right, Cyberman?
The problems start when there's money involved. Maybe some sort of escrow arrangement? "Patrons" could put their money in an account where it stays until the item is completed. If you get tired of waiting, you take your money back and cancel your order. Maybe someone here knows how that can be done.
Just an idea. I'd love to have one of these one day, so it would be great to find a solution that keeps everyone happy.