Broken casement window lock

I have a casement window that the lock was broke when we bought the house. I have been looking for a replacement and found one on your website that looks like it could be the one. I am sending pictures of it and hope you know which one will fix it. It is on the left side of the window with the hole for the handle on the right side. It measures 4 x 13/16 inches. I'm thinking the 38-058R looks similar but I don't have the handle to compare your handle to the one that was on the window before. Not sure about the latching part that hooks into the sliding . Looks like it goes down to far. Any help you can give me in fixing it would be appreciated.

It looks like that one will fix it. All the measurements are right. There is an extension on the sliding mechanism on the side of the window frame because it is a tall window. I was hoping it was one of the cheaper ones but I guess it's cheaper than a new window. I'll have to order one before winter for sure. Thanks for your help.