I really miss poster art sets, I'm sure they still exist but I'm more or less referring to the days of doing them. These Star Trek sets by Open Door Enterprises bring back some strong happy memories, below are the two sets that they offered for much of the 1970s.
Man, that "Star Trek lives" mantra got around in the 1970s.
The art on these seems pretty impressive, a nice bit of work. In my travels I haven't seen many of these kicking around.