"The Yoda Guy" is the only person I know that sold them in the vein you're looking for. He didn't sculpt the original Yoda, but he helped build and ran the latex of the original screen-used puppets (I believe his 2nd puppet became the one we see most on screen). He managed to acquire the original plug used to form the cavity to make the originals and used that as a reference to make legit "as-production-made" replicas. As far as I know, he's only made a few for auction and one for the collection of Propstore.