This web site sells Sankyo musical movements:

  http://www.nationalartcraft.com/categoryA.asp?gid=3&cid=18.

You will find there a list of available stock tunes in the different
sizes.  Reuge sells a better quality movement.  Its movements for the
mass market, as opposed to their highest quality movements, are sold
under the Swiss Romance name via this web site:

  http://www.swiss-romance.ch/

Anyone who wants a specific tune which is not available in the
comparatively small number of stock tunes -- small, that is, in
comparison with the millions of tunes that have ever been composed --
might be interested in a little 20-note, hand-cranked paper-strip-
operated musical movement.  If you have sufficient talent in arranging
music, you can punch out your own tune on one of the blank strips
provided along with five or so pre-punched tune strips that come with
the $55 kit.  It is sold in the U.S. by Nancy Fratti (Panchronia
Antiquities), Canastota, N.Y., email <musicbox@dreamscape.com>.

There is an illustration of the movement at this UK web site:

  http://www.themusicboxshop.co.uk/musicalmovements.htm

Matthew Caulfield