Do you sell this old window lock?

Hello,

Unfortunately, we do not carry an exact match for your window latch, though you're welcome to look through our selection here. This type of part is often specific to the window manufacturer, so you may want to try reaching out to them directly or a retailer that once carried their windows. I'm sorry that we won't be able to assist with this repair but please let us know if you have any other hardware questions. Thanks for posting.