Traco parts needed, left and right slide mechanism

A home owner from Denver says:
Great site, and thanks for your help in advance.

I was attempting to clean my windows. After raising the window (bottom,) it fell down, pivoting from the bottom. Luckily I caught it ...and it didn't knock me out, or shatter, or both. I realized quickly that both of the spring loaded (I assume) slides at the top corners had failed. Sounds like this is a fairly common occurrence. I've uploaded pics. Hoping you can send me two replacement parts, one right and one left.

The windows were here when I bought the place, so I don't know the make/model. They say "traco" on the locks.

These are both 2 7/8 long.
One left and one right.
Markings I can find read:
"4R" on one
...and "6L" (or maybe "16L" ??) on the other.

Also...on the 4R slide itself (not the housing) it looks like: "Pat.Pend 5.139.291"

Matt in Denver
User submitted photos of a tilt latch.
Profile picture of Tom
Tom from SWISCO responded:
Good afternoon, Matt. I would start by looking at our 26-391 and 26-390. Do these match? If not, maybe you have something more like our 26-243 and 26-244. It's hard to make out the thickness of your latches based on these pictures. Let me know what you think.
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