Which latch should I get to replace the one on my front (storm) door?

Question

The locking mechanism on my front (storm) door got broken, rendering it useless. What I’d like to do now is replace the latch with a new one, but I can’t find any branding on the door, so I’m not sure what to get. Here are some pictures of the door and the latch. I’d like to know what would make a suitable replacement. Thanks