Stairport Sceneries released their Aspen–Pitkin County Airport for X-Plane. Worth to mention, not only because of the detailed representation of the airport, but also because Maps2XPlane had the honor to develop a custom elevation model for Stairport Sceneries. The custom elevation model is the basis for the in the scenery package included Photo-Mesh as well as for a patch of the HD Mesh v4.
Aspen XP is available in the Aerosoft Shop as well as from the vendor of your choice.