1968 mayfair single hung window questions

A quick learner from natchez, mississippi says:
house was built in 1968. several panes are cracked and the glazing is cracked and brittle. hate the look of the frames.

i was debating replacing all the glazing, and considering the white. hoping it would change the look. might paint the frames if necessary. can you identify the glazing i need or do i need to remove one and take a photo?

if possible, i would like to replace all the glass panes in the windows with laminated glass. is that possible? can i buy cut panes of laminated glass?
User submitted photos of window hardware.
A quick learner from natchez, mississippi says:
the measurement is 5/16 on the side that goes from mullion and goes down under the glass
User submitted a photo of snap in glazing.
Profile picture of Tom
Tom from SWISCO responded:
I'm afraid we don't sell glass, but we can help with the glazing. See our 55-151 for a possible match.
A quick learner says:
thank you. ordered one to test.
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