Nice assortment of ships, have a catalogue or sites that sell compatible scale ships?
I'll be honest I've been doing these to my own preferences scale-wise. Ofcourse with them being 3d files you can scale them to personal taste. For other ships in the same kind of scale, you can find a number of good ones by Smight on thingyverse, marked as microfleet scale. He also has done a number of fleets for "stars and steel" wargame on wargames vault for very reasonable prices. Gamer god terain do 2 ranges of ship files that start at roughly the same scale though the largest ships go a lot bigger, they don't have thin parts and would scale down to match just fine I think. Lastly national cheese emporium on shapeways sells even smaller ships with the same idea of pocket sized fleets.
Of course I also plan to create another 2-3 fleets to this scale standard. Chances are good that prints of these ships will be available through microworld games under licence.