Older style window sash hardware?.(early 90's late 80's maybe)

A handy person from 93436 says:
August 17, 2022
I have several windows where the cordage and clips have broken off or need to be replaced. Unfortunately, I have no clue as to what these pieces are actually called that need to be replaced. The width of the clip is about 7/16" and approximately 2" long. The cordage hangs from each end of a block and tackle like thing that hangs horizontally above the top edge of the window frame. I have yet to find any brand names or markings, but I also have just started this porject. I'll try some of the lesser used windows and see what i can find. Thanks for any assistance.

Also, is there any sort of standard replacement kit where I can just replace the entire unit in one fell swoop instead of reusing old hardware?
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Tom from SWISCO responded:
August 18, 2022

What you're looking for is called a balance. These are spring loaded regulators that keep the window up when you raise it. Unfortunately, yours is a very old style that is discontinued and, to my knowledge, no longer made. The only thing we still sell is the bracket, which is our 15-209.

I am sorry that we can't help with anything else on this window. It's just too old.
Balance End Bracket
Balance End Bracket
15-209
$9.70
Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
GUIDE
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