Byron thanks for blazing the trail you gave me the motivation. I lucked out and scored some 5/8" laminated plywood from a building recycle center. Brown laminate on the outside and simulated wood grain on the inside.
I was not able to find Undermount sliders in out little town so I had to use 22" bottom mount slider which meant I had to add a little additional framing and I lost about a 1 1/2" in the width of the drawer.
But it came out pretty nice.