A picture of a few 15mm Amazon and Female Centaur Miniatures that I created in Heroforge and scaled to 15mm and printed. All wearing very skimpy cloths. The miniature on the far right is a Amazon from BattleValor (second picture) that I included for size comparison.
Within the limits of what you can find on the internet, a 3d printer can fill in a lot of gaps in armies you cant buy miniatures for. For human and a few other creatures Heroforge, and a few other sites can allow you to create and print an entire army of your own creation. Heroforge is slightly expensive, unless your get your STL's at BlackFriday when the have them on sell for half price. If Heroforge would half their price for the stls, I think they could make 10 times the money, currently they are kind of expenive for just a stl.
A person if they carefully look, can find stls at sites line MyMiniFactory or Patreon, or Thingiverse and scale them down ( or to any size one wants )
15mm Amazons are very scare, about the only I can find are BattleValor ( all fully clothed and kind of Zena like) a few nude Greek Female 15mm Greek from Museum Miniatures, Lone Gunman Games (kind of Zena like) and a couple Cobblestone female Barbarians. Not much else that I am aware of in 15mm.
So the only option is the design stls and 3dprint if you want the skimpily clothed Amazons in 15mm, or search for a few STL that will scale and print (without being to fragile or too thin that the weapons break. You dont know how many attempts to print the Amazon archer on the horse I did before I got the supports right that I didnt keep breaking off the feet when I stripped the supports. ARG!!!
I have several more designed, a few printed and not painted, but I intend to make a full army of amazons.
Photo blocked by adult filter:
"Amazons *adult*"