I am looking for an "off-the-shelf" musical keyboard sub-assembly that
I can integrate into a synthesizer.  This would be something like what
is found on inexpensive "consumer" keyboards by Casio with
non-velocity sensitive keys.  The sub-assembly should include:

-Molded plastic keys, anywhere from 25 to 49, miniature or full-size
-The underlying circuit board with silicone switch membrane

I will be building my own enclosure and keyboard scanning circuitry,
and will design them to match whatever keyboard sub-assembly I can
find.

I will be purchasing a quantity less than 500 units.

I would like the contact information for one or more suppliers of such a product.

Depending on where you are in the world will depend on where u can get
one. I got a keyboard from Myer, a casio, for about $100AUS last year
and purchased the cable from Harvey Normans for $20 to plug it into
the computer. Try Myers, harvey normans, tandys, or australian academy
of music, allens music, local music stores. Or EBAY!
Hope it helps