I think there was only one on-list response to my 090813 posting
seeking an Octet UM-0 or UM-1 circuit board, but I did receive
several private emails.   As a result, we located and bought an
Octet UM-0 circuit board, and also learned that there are a couple
more available for anyone needing one.

In addition, several responders pointed to other circuit boards
capable of driving a roll perforator from MIDI just as well as
Ron Perry's Octet boards do, or even better.  I thank you all for
generously contributing your knowledge and your time.

Matthew Caulfield
Irondequoit, New York