Channel balance needed

A quick learner from Peoria, AZ says:
See attached photos of part needed. The number stamped on the metal is 21-2. The actual measurement of the metal channel is 21 5/8. Not sure of the series. A stamp on the bigger plastic end piece looks like PAT 6598264.

User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Hey, Kent. We should be able to replace this, though it will need to be custom made. Before we begin, can you just show me a picture of the metal clip at the end of the cord? Can you also tell me how many you need?
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