Any people interested in helping out with one or several of these? You must know HTML and CSS. Some PHP skills (at least for reading existing PHP code) wouldn't hurt. I'd be happy to point you to the relevant files.
On the long run, it would be best to extract some common CSS rules from the primary website and then put those into a separate CSS file, which then could be shared between all sites, to ensure uniformity. Of course each site might have its own physical copy of that file, for various reasons, but they'd be identical copies. Anyway this is a detail .