Hello Terry,  preferably you get in touch with us at Raffin directly, so
that we can assist you with this:  http://www.grindorgans.com/raffin.html 

I thought there were more ragtime rolls for 31-keyless.  Of course, all
20-note arrangements can be easily "converted" to play "as-is" on 31er.
I have also a ragtime roll for sale with "Root Beer Rag" and "Solace"
-- alas, also 20 notes.

I found the following at http://www.barrelorgan.org/ragtime-plus.html 

  2138  Ragtime in Deutschland
  Eine fidele Neger-Hochzeit/
  Cake Walk von R. Vollstedt
  Das kleine Niggergirl / Each evening he sang to the banjo's klang,
    von Walter Kollo
  Kleine Kanone/CanonBall
  Ragtime Two Step von Jos Northup
  Iola.  Two Step von Charles Johnson

Musically,
Ingmar Krause
http://www.grindorgans.com/