The Fusion and Clay models for sure. In my group of buddies there is a Gold Hunter that is eight to nine years old and a Classic Hunter about four to five years old. Neither one of them came with shims. My first 3 1/2" MOSG model from five or six years ago did not have them but my new 3 1/2 MOSG with Dura-Touch did have a set with six shims. They are unlike my Franchi shims that are for both cast and drop. The Golds are seperate for drop and cast. There are three for drop and three for cast. The Elvolve also comes with shims and is in the Gold family but, they do not intrerchange with the other Gold models.
You should be able to get them thru Browning if you want a set. I also thought I saw them somewhere else like Midwest Gun Works but, they don't list them on their sight.