Side Door Latch?

I just bought a 6X12 CT. I am very impressed with all I see here on this forum. I don't plan on a full on conversion, but do plan on some improvements to make my CT useful a couple times a year for sleeping in.
One thing I'm wanting to do ASAP is a door latch on the side door. As it is now there is a "typical" door locking mechanism. Not sure what it is called, but it is a pivoting pipe with an arm that pushes against the door and clamps into place. No way to latch from inside the trailer. And would be a safety issue if someone decided it would be funny to lock the door with me inside.
So do you guys with experience suggest I remove the existing locking system and replace it with some type of door latch? Where can I find something that will work on a CT door? Would like something that can be locked from inside or out if available.
Thanks,
Ron
One thing I'm wanting to do ASAP is a door latch on the side door. As it is now there is a "typical" door locking mechanism. Not sure what it is called, but it is a pivoting pipe with an arm that pushes against the door and clamps into place. No way to latch from inside the trailer. And would be a safety issue if someone decided it would be funny to lock the door with me inside.
So do you guys with experience suggest I remove the existing locking system and replace it with some type of door latch? Where can I find something that will work on a CT door? Would like something that can be locked from inside or out if available.
Thanks,
Ron