Click the link in my signature for PDFs for GB1 and GB2 gizmos that you can print and stick to a backer of your choice (I like styrene ‘For Sale’ signs glued up as many layers thick as you need with a protective clear coat over the top) as well as templates for the holsters (again in GB1 and GB2 versions) that you can make out of leather, vinyl, foam, or any other suitable material.
You could just use the printout and go, though lots of people have gotten creative with things like gold-tone paper clips for the IC pins and chopped up clear pen bodies for the VFD/nixie tubes.