This is router jig for a Lockwood mortice faceplate. I recommend printing in petg. You will also need a piece wood depending on how you want to clamp it on to the door.

You will need a piece of timber or two to clamp It onto the door and screws to connect the wood and plastic

Instructions to use.

Print the model(obviously)

Drill the screws and connect the wood and plastic 

Clamp It onto the door and router the door.