I know they are rare as hen’s teeth. Every one manufactured has been smashed or is on a custom Merc somewhere. Looks like reproductions are no longer in production. I could be wrong. I think if I could borrow a nice set of eleven, I could have them 3D scanned, then make molds for new parts. My son works for a rapid prototyping company, so this is not a very far-fetched idea. Anybody got a set? They can make an ugly duckling pretty.