Its like the opposite of Fistful of Dollars. In the opening scene of this movie, Regan, a "Bounty Killer" is disguised in a poncho and sombrero, and rides up on a donkey to do some business, Spaghetti Western style. Then he goes to a Montana town where the ranchers and farmers are engaged in a dangerous fight. After first appointing himself Sheriff, he works like a trooper to bring justice to the town, more along the lines of a 50's American western.

Check out my list: https://trakt.tv/users/jeffsmith99/lists/spaghetti-westerns-i-want-to-watch

You may be able to rent it on Amazon Prime Video

Search for it on the Roku Streaming Channel called "Spaghetti Western Central"

Or look for it on YouTube: "A Few Dollars for Django (Spaghetti Western, English, Full Movie) free full youtube movies"
https://youtu.be/yMX27jnpwak