The truth, is that there weren't really any ceiling fans available back in the cowboy days. Really it was only a little over a hundred years ago that the first sweating inventors were compelled to attach a fan to the first electric motors, but even then those contraptions were primitive by today's standards.
In fact, it took years for people to figure out that more then two blades could be attached to a fan. So really the first true ceiling fan that any cowboy had access to was just after the turn of the century. It most likely had two blades and was pretty much an electric motor with a two bladed fan on it. All hung from a ceiling.
Even so in this age of westerns where six shooters never run out of bullets, why let a bunch of facts get in the way of designing good rustic western ceiling fans. Fans that if there were fans back then, a cowboy would risk his life in a showdown at high noon for.
So the good news is that there is a whole “barn full” to choose from out there but the bad news is that they generally don't come cheap. Oh sure you can find deals on them just like pretty much any other style but once you dip below $200, they just start to lose their “western-ness”.
You see the real irony is that it's ornate details and craftwork that define these fans, that in reality, if they even existed back then, were quite simple in form and function. But lets not worry about those minor details because some of the better designed and made rustic western ceiling fans are nothing short of true works of American art.