need part for Atrium window

A handy person from Atlanta says:
Need help to ID of part(s) and info on where to purchase them.

I have all Atrium double hung wood Low E Argon filled windows. Not sure of the exact series, but they have some sort of external vinyl cladding and have the slightest light green tint (barely noticeable) in the glass.

I was cleaning them today and the piece of hardware on the lower corer of a bottom window snapped off when I rotated the window back upright. This piece is what anchors the bottom corner of a lower window into the sliding track.

Need for someone to ID this by part number and let me know where I could purchase some for spares. The one that broke is a left side one and they appear to be symmetrical but opposite from right and left. If so, I would like part numbers for both left and right parts so I purchase several of each for spares. The photos I attached are from the right side of the window.

These windows were purchased in 1993 when I built the house, but I am not sure who the distributor was.
User submitted photos of window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Thank you for posting! I don't think we have an exact match for these pivots, but you might want to check out our 26-151 & 26-152 and see if you could use these as replacements. Compare them to your own hardware and let me know what you think.
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