Vinyl window replacement latch

A handy person from Michigan says:
light brown colored plastic vinyl window replacement latch

with an item number 11403 and a patent # 4,901,475

last summer I typed this into google and found a replacement but this year nothing is coming up..
Thanks
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Paul from SWISCO responded:
I'm not sure what it is you need. Patent numbers aren't often the best method of identification. Could you be looking for our 26-120 and 26-121? Look them over and see what you think. If not, please show me a picture of your existing latches so we can find a better match.
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