Sliding door lock broken

I don't know the manufacturer of the door but the lock won't work. I'm not sure if the whole thing needs to be replaced. I remembered it working for a while then all of a sudden it didn't work anymore and it seems like I'm the only one who remembers it working and the only one who wants to get it fixed. This would be a great help as this has been driving me crazy. It looks like you guys are really good with answering questions so i hope you can help me.

The measurements match up perfectly. I didn't think it would be so easy to find the lock i was looking for. One problem was that i wasn't able to measure the bottom of the lock in 16ths. It measured at 7/8 but i assume that it would measure up to 15/16 if i had the right tool for it. Is this a simple set up where you just unscrew the old one and screw in the new one?