I just ran across this post at All About Romance: Total-E-Bound is seeking erotic steampunk/steampunk romance submissions:
Total-E-Bound Publishing, a leading Erotic Romance Publisher, is now accepting submissions between 10,000 words and 100,000+ words in the steampunk genre:
Steamy stories set in a might-have-been world of clockwork technology. Join naughty neo-Victorians—from mad scientists to erotic automata—in their inventive adventures.
I couldn’t find the same information in the publisher’s submission guidelines, but maybe they just haven’t updated it yet.