I've written a few supplements using 15mm Sci-Fi miniatures. Originally I intended to make one of these for every major manufacturer, but abandoned it when I started creating my own individual unit cards. The original files are hosted on a side page of my blog: if anyone wants to try them out.
I will update that page in the future with some of the unit cards I've been using. If anyone wants to take over the manufacturer-specific supplements, I'd be happy to send you my draft files.