However, I did find a black poly binder that should work quite well. Thanks for the idea Tony!

No prob. Make sure to use a very straight metal ruler, and a very sharp X-acto knife when cutting. (And cut on top of something that you don't mind being full of slices, like a piece of scrap wood.)

There will be some trial-and error involved, you will probably have to cut a tad "big", then trim down carefully, an edge at a time, until it fits perfect. Once it's all looking perfect, some RTV silicone will glue it to the front edge of the sled quite nicely, however you should try to do it with the sled removed from the dash so you don't get glue on the dash.