Not an area of interest for me but have you explored the pre-printed 3D market for options? I've had some luck finding 15 mm aliens for my Star Wars project - just a little more specific stuff to collect to call it 'complete', though hardly a start on painting with only 1 figure finished and around 30 in just begun progress. Many, many more to go.
What stuff: Leia and Jabba in the lair and the Mos Eisley band (why not?) and then three more 'units' and a few bits like some more aliens.