Vent latches for Bryn Mawr Double Hung Stage 4 windows

A home owner from USA says:
We are looking for vent latches to replace the ones we have that broke but we can not find the exact size of the ones currently in our windows.

We have Bryn Mawr Double Hung Stage 4 windows. The Vent latches fit into the window slot that measures 2.820 x .420. Your Vent Latch Product Code: 26-148 is the same style but is slightly smaller.

Do you have the ones we need? If not, would these fit anyway or do you know where we can get the size we need? Any help you can give would be appreciated. Thank you.
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Tom from SWISCO responded:
We might have what you need. Could I see a few pictures of your existing vent locks? That will help us find a good alternative.
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