I'm 99 44/100% sure these are licensed to Garrison (among others) from 3DBreed miniatures who had several kickstarters for mini lines for several periods. I'll venture a guess that almost all of you play at least one other of the periods they also do:
https://www.kickstarter.com/projects/joinordie/march-to-hell-napoleonic-warsTheir home site is
https://3dbreed.com/on Facebook
https://3dbreed.com/I had some printed up by a nice gent here in the states and though I haven't had an opportunity to paint them up and base them, the prints from my guy were clean, sharp prints.
https://wargamerprinting.com/I'm not sure how to compare the same files being printed by different folks on different printers with different printing materials. I don't know squat about the technical details so I just wrote to John at JSW and he gave me his take on the process and the stuff he uses and why. I'd imagine Garrison is using suitable materials even though they might be different from what JSW uses.
NOT inexpensive, but top quality IMHO I'll also recommend Forrest Harris at Knuckleduster. Excellent digital sculpts of both generic as well as a great deal of (not) characters from TV and films. So if you are looking for characters that are well done and you haven't been able to find them, mosey on over to Knuckleduster and take a look.
His most recent set is of four western characters walking down a Mexican street together loaded for bear to have a nice calm gentleman's discussion with the Mexican army about them releasing a friend of theirs who was captured by the army. So these might be mistaken for the (not) Pike Bishop, (not) Dutch, and (not) the two brothers, but the resemblance is uncanny.
https://knuckleduster.com/