Pratt-Read keyboard action

[Davo]

I'm trying to source a 44-key Pratt-Read keybed. Pratt-Read keybeds were frequently found in electronic organs from the 1950s to early 1980s. Spinet organs have 44 keys per manual and tend to appear frequently in the local thrift stores, so I figured I'd get one and cannibalize it. My problem is I don't know which manufacturers used Pratt-Read keybeds. I'm pretty sure Hammond didn't. I know Schober did, but they're hard to find. Can anyone help me?