Kent,  The late and famous collector Benet Meakin in England had a
dismantled Duo-Art Pipe Organ with several hundred rolls for it.
I believe the organ has been sold with some but not all of the rolls.

One person who is likely to know the true situation is Denis Hall who
has recently bought part of Benet's truly immense Duo-Art piano roll
collection from the executors.  He is not on email or fax but can be
phoned at +44 181 462 3384, or I can give you a plain mail address.

Dan Wilson, London