Dayton-Traister makes a nice one
+1
And their Speedlock/cock-on-opening kit is pretty nice as well.
You do have to modify the cocking ramp but IMO that is what makes the D-T system the best.
My Step Dad had a 1917 with a Dayton-Traiser trigger speedlock unit in his that he did not long after WWII ended. Not sure when D-T came out with that system, but they've been around for a long time.
It was in the original 30-06 with a Curly Maple stock that was a good looking rifle. It had iron sights only, and I used it one year for hunting. I do LOVE that safety.