Buon Natale!
I have not stayed current with the availability of reproduction uniforms. Equipe Sartoria has always been the only source I trust.
RE: Lo Stile degli Eroi. I am not sure, but I believe those uniforms are Hiki with a considerable mark-up. I ordered some A.S. items from either that shop or an other in Italy a few years ago. Definitely Hiki items. When I was researching reproduction uniforms, only SE was making their own uniforms, everyone else was buying from China.
The main issue with Hiki (if you can get the sizing right) is the cloth. You never know what you are going to receive color-wise. When Hiki was first in the market, our group took the position that the Hiki uniforms (at least the M40s) were okay. The cut of the uniform had some issues, but not enough to be a problem in a reenacting setting. With the variations in cloth color, I feel Hiki can be a crap-shoot.
I don't know if any has ordered from Schuster in Russia. I believe they were making Italian uniforms. I vaguely remember that some had issues wither product as well, but I would need to ask around. As a company, they are very reliable and good to work with (I order my WW1 Russian items from them). However I don't know the quality of their Italian items (or if they make them). I will ask around.
Have you asked the FB Italian groups?
Pista! Jeff