Hmmm....
You said....
SO my assumption is that you already know of these studies that exist. Wait, I thought you already knew about these studies. Why did you need to do a Google search? And then...of your great Googling skills, only to provide...this....
The above is not a study. It is a Wikipedia article, that is defining what Cisgender means. 1) It is not a study or anything close to one 2) There is nothing there that backs up your premise of "...dominantly straight males who enjoy depictions of futa and transgendered..." as the statement is referring to Cisgender which describes Gender identity. Are you saying Gender Identity directly corresponds to sexual preference? Gay, Straight, or otherwise?
This is not even a study....it is an article from 2016, that..backs up some of what you are saying, but barely. First off the statement off the back is based on stats from an single paid adult site, Adult empire. Are you saying that we should generalize that statement across all areas based on a single paid site? Are those numbers still the same now almost 10 years later? What is the breakdown between Gay Men vs Hetero Men? Is it 60/40, 70/30. 80/20? Redtube said the majority of trans searchs where done by men in 2013. Ok....that's a long time ago, but should we be generalizing based on a single site? Do we know if those men were gay or straight?
The thing is simple....you basically provided an Wiki article and a news article (that has been removed from the site and is no longer available) top prove your point. Studies? Come on now...you can find anything on the internet to prove your point. Let's not act like there is academic research and scholarly articles on this topic which conducted unbias studies.
"Studies"