You are asking for some very specialized information in a language that isn't native to the issue. I did a quick Internet scan and didn't find anything remotely useful in English and not much more in Italian.
Note this is NOT my area of research.
The one book I saw that might have a remote chance of answering, in-part, your question is
Le Bande V.A.C. in Dalmazia 1942/43 by Teodoro Francesconi. Amazon has it
HERE
I only say it might have some answers because of the color drawing on the front cover. I have NOT seen/read this book, so it is only a swag.
What are your Men at Arms sources? I would like to review them.
There are two issue with your query:
1) These are irregular units, so could have any type of organization/structure. I don't know if the Italian authorities imposed some sort of organization/uniform, but it isn't likely. From the pictures I saw, it didn't look like a uniform appearance.
2) Not only do these units cross ethic lines, they also cross religious lines. Just another vector that can limit standardization between units.
I feel you will need to go into Italian language sources to answer your question. However I don't believe this has been comprehensively addressed even in Italian, but I am willing to be surprised.
Pista! Jeff