Hi all, Kim Bunker here from Orange Coast Piano.  When we purchase "O"
rolls the source we've always used is Play-Rite and others.  From these
manufacturers of "O" rolls you can get just the roll and its box and
you don't have to pay so much extra for those plastic flanges you're
gonna throw away anyway.  That type of flange only operates on one type
of system.  Most original nickelodeons and orchestrions operate with a
metal flange which a lot of these instruments come with.

Sincerely Kim Bunker