I recently found this Star Trek Stardate calendar and address book software for Windows 3.1 - between this and the After Dark Trek screensaver I should be able to decorate my computer desktop like a true early 90's Trek fan! I can't find this anywhere on the Internet Archive etc, so I'm currently putting together a greaseweazle setup so that I can get this backed up and archived.
There might be a computer surplus store in your area that has the antique equipment you need.