Ya know, I found a "back door" to the Delta 7 Studios site that I'm not sure Dan knows about. By linking from Niels:
Nielspapermodels - links to the free model of Columbia
http://www.delta7studios.com/columbia.htm, and then clicking on the "Home" link, you go back to the previous style of page that offers the models in sets on CD:
Spacecraft Paper Models - GEMINI BLUE. Not sure if he's still selling them that way or not, but he should be aware of the "back door".