Space Kits i'd like to see....

I thought Skylab had been done once. Maybe I'm just remembering a scratchbuild I saw sometime way back.

Check out http://www.realspacemodels.com/ . They have most of the probes you were asking about.

Skylab was done by Vista Replicas, whom developed a nasty habit of taking peoples money and disappearing.

Glenn at Realspace is working on a Skylab but the truss needed to support the Apollo Telescope Mount poses a huge technical challenge.