Matching sliding window lock

Home Owner from Washington State
We've got some quite old style sliding windows, they go up and down like in one of the photos.
There are still locks working, but we could not identify the "Fentron" being a manufacturer. There is a photo giving the bottom (inner) side. This one has a broken piece though.
For the ones missing, we have holes and screws on the window frame still.

We are wondering can we find similar pieces? The window and everything else is working, and there are screws on the window too. We just miss some locks.
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Paul
Paul from SWISCO
SWISCO
Expert

In the 1950's, Fentron Industries were making residential aluminum windows. In the 1960's, they got involved in making commercial windows and the type of thermal barrier windows you have now. Unfortunately, I wasn't able to find out what happened to them after that. 

We will try to find suitable replacement for you. Before we begin, can you give me the and depth of the latch, as well as the spacing of the installation screw holes? Make sure to measure from the center of each hole, not their edges.

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