[Ref: James Williams in 230124 MMDigest]

Hi there, Extensive lists of 31-note rolls can be found on my webpage:
http://www.grindorgans.com/rolls31.html 

If you are in the USA there is also a limited list at my competitor's
site: http://www.popmusicrolls.com/catalog/raffin31/ 

If you are in the UK there is Melvyn Wright -- I didn't find his list,
though: http://www.melright.com/busker/punching.htm 

Also there is of course Ian Alderman:
http://www.barrelorgan.org/catalogue.html 

In Germany you can also find rolls from
https://www.drehorgel-edihofmann.de/31er-tonstufe/ 

In the Netherlands: https://www.thomas-sterk.nl/en/music-rolls/31-note 

In France:
https://leturlutain.fr/index.php?item=&action=page&group_id=10000007&lang=fr 

Aside of that I want to inform all about my own arrangement services
which I have recently extended from 20 notes also to 31-note and
42/44-note chromatic scales. Some examples:

https://www.youtube.com/watch?v=ofXaJRDXexY
 
https://www.facebook.com/100077168005666/videos/717407879783338 

Please do not hesitate to get in touch for questions.

Musically,

Ingmar Krause
Coquitlam, British Columbia, Canada
http://www.grindorgans.com/