garry:

Digikey carries a number of the type of devices you describe, I think they are made by OPTREX.

They use a standard Hitachi LCD controller and are quite cost effective, especially in the size you require and even more so if you don't need stuff like electroluminescent backlighting.

I believe that Optrex also has a site "www.Optrex.com" I'm pretty sure I got some info and used them in an old prototype project.

Good luck.

Mark.