Old snap in window glazing for "Living" brand windows circa 1991

Hi. Looking to replace these as they are cracking. Color is biege. Appearance when snapped in is squarish.

The dimensions are:

Top side: 6/16"
Longest side: 9/16" - has a slight indention but it does not show in the photo
Side showing indention in photo: 7/16"

If I can find some just like this I might be able to keep some in place that are not yet cracked. If not, it would involve full replacement on several windows with something (preferably) in beige that will fit this type of window.

Thanks,
Bart Bonner
Austin, TX