Searching for IWC window sweep locks

Checking with our supplier, they tell us that the IWC sash lock that you show in your photo is no longer available. They suggest using the 90-313 sash lock and remounting the holes at the top. You will need to use a screw similar to the 33-011 . Be careful, though; you don't want to use too long of a screw or drill too deep. You could damage the frame or the glass in the sash. Choose wisely. Do you think you can manage this modification?