[ Ref. Bing Gibbs in 170427 MMDigest ]
 [ Baldwin valves and seats made of Bakelite
 [ http://www.mmdigest.com/Attachments/17/04/27/170427_184311_IMG_0314.JPG 

Bing,  These appear to be excellent candidates for duplication using
3D printing technology.  Unfortunately, I have none in the "boneyard",
but if you care to send me a set, even if broken, I'll be happy to take
a crack at them.

John Grant