Sash Balance Window Catch

A quick learner from Jersey City says:
Dear Swisco,

I ordered the S385-27 to replace the sash balances on my window. I didn't realize that the plastic catch that pulls down the balances also broke before.

Now, I'm looking to replace this part that sides into the window and is held in place by 2 screws. Can I have help in identifying this part?
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Bob from SWISCO responded:

Hello there. I think this might be our 18-072, but you'll need to carefully compare the dimensions to ensure it is a match. 

18-072 : Top Sash Guide
Top Sash Guide
18-072
$7.42
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S385-27 : 27
27" Series 385 Channel Balance
S385-27
$9.84
VIEW >
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