window sash lock

I am afraid I don't recognize this type of window lock. I am going to forward this over to our senior experts for them to have a look. We will reach out to you as soon as an update becomes available. Thank you for your patience with us.

I'm afraid that I could not find the security lock shown in your photos. That said, take a look at the 26-387 along with the video shown on its store page. This the type of security locks we carry. I'm not sure if it will work for you but we don't seem to have anything else that comes close.

Have you contacted Cascade to see if they can still supply you with the lock you have now? If not, I'd recommend giving it a shot. That is probably your best bet. 

As for your glass seals in the insulated glass, you will need to replace your insulated glass entirely. There is no way to repair the seals. Contact a hardware store who repair insulated glass or a glass shop in your area to have them do the work.