Haven't killed enough to start one yet. Did full fan/beard/spur mounts for my 3 longbeards last spring and just the tail from the jake. When I start a beard board I might use a piece from an old barn or something.
Here is one I designed that will display a turkey fan, custom pot calls & strikers, and beards. Hope to start making some of them after the holidays are over.
I drew up several models depending on how many calls you wanted to display.... just adjust the height to hold the next row of custom calls.... I believe it was 6" added, per extra row, to the overall height.
Also did one that instead of displaying calls, you could display hunting memory pictures.