Hi Robert,
If the inside of the side panels is as flat as the outside (no wooden chassis brackets like in the four-sided AN series), then this might be just a matter of picking out a 4 foot piece of 5/8" by 8" stock and having a lumber yard make the cuts for you (one rip and two cross-cuts). My full-service yard charges a buck a cut. Some of the Home Improvement Warehouses offer the first one or two cuts free - used to, anyway.
Then all you need is a drill, sandpaper and a little finish.
Hope you got my P.M. before lights went out on "e-mail" here.
All best,
Mario