Replacement slide bolts for screens and storm windows

A quick learner from Niles, MI says:
We are looking for replacement slide bolts for several screens and windows on an older house. The markings read as FLYNN and Detroit-Indianapolis.

PS. I already tried to send this message and received an error, so I am trying to send it again.
User submitted a photo of window hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Please see our 91-185 and let me know if this could match your storm sash. It's not an exact match, but it may be the best option we carry.
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