The only commercial options is Battlevalor that I know of, but there is a even better option. I have wanted some Amazons also for 15mm and the options are very scarce. I also wanted my Amazons dress very skimpily so that they were also Amazons.
So, every year Heroforge has a sale on their STLs so the last couple years I have designed some Amazon both foot troops and Calvary, as well as some Centaur.
Heroforge minatures print well at 15mm ( at least the 18mm version of 15mm that matches well with Demonworld and also Battlevalor). I have some printed up, but am way behind on all my my painting. but anyway, a resin printer allows you to print and design almost any amazon you want.
there are other miniatures that can be scaled down to 15 from Myminifactory, patreons, Thingiverse, and many others print well at 15mm but things with small weapons may fail.
I have also recently scaled up some 10mm Forest dragon miniatures to 15mm also.
When you have a resin printer, you can print both a 15mm copy and a 28mm copy or any other scale you want.
Anyway, someday when I get to painting my Amazon army, my resin miniatures will be next to Battlevalor miniatures, but my resin minis will have a lots of bare skin.