how do i fix this?

well i know i can patch it up, thats not much of a concern. Im wondering where to get the little key insert thing and how to make it match with the rest of the vehicle?

if you only want one key, your gonna have to buy a kit, door locks and ignition switch, otherwise you can use two, well 3 keys, since it's the pass side I'd go that route unless your doing a full resto.