Hello, MMD.  Once again, the MMD has proved to be a valuable resource.
I received several replies to my query in MMD 130818 about my damaged
Duo-Art roll, "Collegiate", including a reply from Anthony Robinson,
who provided me with a scan of the missing edge chunk.  I was able to
print his scan, splice it into my roll and punch out the holes by hand.
To my ears, the roll now plays perfectly.

So "thank you" to my respondents and particularly to Anthony!

John Phillips in Hobart, Tasmania