"Vampirehunter D: Bloodlust" might be a source for inspiration for robotic horses.
Good call!
Off the top of my head I can really only think of a couple more: the robot horses from the movie
Westworld (who were indistinguishable from regular horses) plus the two cheesy Saturday morning cartoon horses below. There must be loads of other robot horses out there though.
He-Mans Robo-Horse
"30 30" Bravestarrs steed
30 30 could rear up and use his shotgun too, more of a sidekick than a steed really. Amusingly ridiculous IMO.
Both of those examples are pretty goofy. In the context of space cowboys however where is the line drawn? Space cowboys themselves are a bit goofy too.
And I want my robot horse figures gorrammit
