^^^^ This what you want to do.
I have had very good luck with a good rooster...but not all roosters are good. If you can get a rooster, that has been raised in a multi-generational flock that has free ranged, that is close to a year old... that is about perfect. As you approach the coop/run, he should be the first to see you. What you want is something so nice, that they just were not quite willing to cull him.
A lot depends on the predators you have, I have found roosters very good protection with flying predators, and sometimes coyotes, and bobcats, and foxes. I have lost some feathers or the rooster, but kept my hens with these sometimes.
Ask at feed stores, county extension agents often know of poultry clubs, 4-H kids.