
I like the cartoony presentation on this image, it looks good visuallly and also fits the retro/pulp context of the subject matter. The doctor character looks good as well.
You're probably already aware given your Trek interests, but there's an old forum with lots of Trek freebies at
http://www.xcalpro.com/tng/index.php . Apparently they're closing down soon

, so you may want to check and see if there are any props you don't already have.