Window latch
Thanks for posting! There is a chance that we care able to offer a replacement solution for the internal latches you are searching for, however, I'll need to see the latch removed from the window to confirm. Take a look at the video below for instructions on how to remove your internal latch from the window.
Your tilt latches resemble our 26-334 tilt latch pair. Look over the dimensions and compare them to your existing latches to determine if these might work as a replacement.
I'm sorry to say that we would not be able to assist with replacing the screen frames. You'll need to contact the window manufacturer or a local window supplier for assistance with getting those replaced. We do not carry the framing to make the screens and do not sell any pre-made screens.
However, we do carry hardware like screen corners, pins, latches, and screen mesh that you can use to repair old screens.
I apologize that we can't be of help with replacing the screen.