Need a replacement

Hi - we need to replace this part, it's at the bottom of the front front door (we have double doors) without the door handle - it's used to lock the secondary door into place. We call it the 'thingy'- and the thingy is now so rusted the locking mechanism no longer works... I'm sure it has a proper name of some kind. Home Depot person suggested we contact you. It's 7 inches long including the rounded top and 3/4 of an inch wide. And ignore the dirt. We have kids and dogs. 'Nuff said.

Thank you!

This is it, perfect! Thank you so much!