Do you sell these replacement handles?

Hello, Robyn. These look like very old style handles. We may have something that can work for you, but before I can say anything for sure I will need a clear picture of one of these removed. Basically, I need to see the back end of it, which is what physically locks the window. That's the major design feature that varies from lock to lock, so I won't be able to narrow it down without seeing that.

You can see our full selection here in the meantime. I also want to stress that depending on how old your window is, there is the possibility that we don't carry a good replacement. While our selection is fairly robust, there are many more that are simply not made anymore. Your lock here may very well be one of them, but I won't know for sure until I see the whole thing.