There is a product called model ply. This is a birch ply from Finland and
is available in thicknesses from 0.4mm up.

"Marc Reeves" wrote in message
. ..
I just bought 4 luaun "door skin" at Lowes home supply store. I know you
can find 1/4 ply there too. Anything thinner should be found at specialty
hard wood retailers.