Need replacement tilt vinyl window balance parts

A handy person from NorCal, CA says:
Would like to replace old tilt locks that are broken and a couple springs of you have something that would work. Need about 10 spring channel locks and 3 springs. Could also replace with spiral or channel balances if it would work.

Only name I can find is "Polybau" on the Window lock latch housing.
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Tom from SWISCO responded:

Thanks for reaching out to us! Your pivot shoe appears to match our 15-218, but we unfortunately don't sell the springs. I also don't think you can use any of our more standard balances as an alternative.

Review the dimensions for our 15-218 to verify that it's a match.

Alternate image for 15-218
Alternate image for 15-218

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