Western a la Red Dead Redemption with MM subplot?

I looked on the MMRomancenovels subreddit already. I am not looking for a romance novel, however. I am hoping to find a novel that takes place in a world similar to that of Red Dead Redemption, which is to say America during the days of cowboys, bandits, sheriffs, outlaws, saloon, stage coach robbery, etc. I would like it to feature a romance between two men, but not as the main focus of the story. Does such a thing exist? Thank you!