Channel Balance replacement

A quick learner from USA says:
Our building was completed in 1997. This channel balance is 1/2" (+ a hair) wide and 18" long. The only markings are those in the photo. Can you identify this and tell me the price for a replacement including attached top and shoe?
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
It looks like you have two different balances, though I'm not sure which end goes with which. I recommend that you look at our 1/2" Channel Balance Page and seeing if anything here would be a good match.
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