Slidebolt for stormwindow

A professional from McMurray, PA says:
Please help me identify an appropriate replacement for a Guardian storm window slide bolt in both left and right hand. Stamped into the back is a 'BR' and '4'.
User submitted a photo of a storm window latch.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting. The closest match I've been able to find is our 91-023, though it's still somewhat different. Do you think you could use this as a substitute? Make sure to also look over its thickness, which may very well be the deciding factor.
Alternate view of 91-023
Alternate view of 91-023
How to install a window screen latch
How to install a window screen latch
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