If you can carry the custom folder in another way, like on a lanyard around your neck...or in a different pocket..or in the same pocket but separate the 2 knives with a handkerchief:
Use any big folder...take the clip off...put it in the bottom of your right pocket...no one should see it in there... if they do ask them why they are looking at you there.
Use any big folder...take the clip off...put it in the bottom of your right pocket...no one should see it in there... if they do ask them why they are looking at you there.