I need 2 balances (maybe coil only) For a Bryn Mawr II

A contractor from Port Huron, Michigan says:
It's a single hung. Window unit size is 28 3/4 x 53 1/4. Lower sash size is 25 1/8 x 26 1/8

I bought a whole house full of windows. All parts should be covered under warranty, is there a way I can get then for free.

I'm willing to pay for shipping but need the right parts and direction to reinstall them.

Thank you, Tom
User submitted a photo of a coil window balance.
Profile picture of Tom
Tom from SWISCO responded:
That shoe looks like our 15-155. Do you agree? If so, be sure to also see our Series 170 coil spring. I also recommend the video below for installation instructions. The hardware featured in the video is different, but the principle is the same.
I'm afraid we cannot honor the warranties of other companies.
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