I suspect this is mainly a demand thing... 15 years ago there was very little climbing equipment available for women and now there is lots as climbing in general has become more popular numbers of women have also increased.
I have had trouble finding a caving harness, but there are at least a fairly large range available to try. I also know men who've had trouble finding the find harness too so I'm not sure how gender specific that issue is.
Perhaps there is scope for more women's oversuits, but then some of the women will still buy the men's ones...
I think I would most like a large tackle sack aimed at women /shorter people as I have found them all too big in the back and uncomfortable.