The word you're looking for is Gynandromorphophilic (GAMP) men. It's been studied in a limited amount:

Gynandromorphophilia (GAMP) is attraction to gynandromorphs (GAMs), who are natal males with both breasts and a penis, colloquially known as “she-males.” Men with GAMP (n = 314) and heterosexual men not attracted to GAMs (n = 211) completed an Internet survey regarding their sexual attraction patterns, relationship history, and potential correlates of GAMP. Men with GAMP reported much higher attraction to natal women than to men, although they also reported slightly higher levels of bisexual feelings compared with controls. Men with GAMP were equally attracted to natal women and GAMs, on average. Thus, GAMP is best considered an unusual form of heterosexuality rather than a separate sexual orientation. Indeed, men with GAMP scored much higher than controls on a measure of autogynephilia, or sexual arousal by the idea or fantasy of being a woman, which is also considered a variant of heterosexual attraction.

(source)

Not saying I agree with the conclusion necessarily because this is based on an Internet survey and I think there is a lot of social pressure for such men to see themselves as and be seen as heterosexual. And most notably the fact that being GAMP is connected with having autogynephilia certainly creates a vested interest. Not surprising because they're the ones creating and consuming trans porn and getting inspired by it. I am also perplexed by how this abstract justifies a conclusion of heterosexuality after saying they have "more" attraction to women than to men.