broken coil balancer spring

A handy person from Richmond, CA says:
Balance is marked 6R. Lower sash of an Anlin double hung window, 29"W x 35"H. The sash weighs 13 lbs. Parts look OK except for broken coil, so if possible I'd like to order just the coils (6R and 6L). Thanks!
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Casey from SWISCO responded:

Hello,

Take a look and compare the dimensions of the S140-6 assembly to yours. Unfortunately, the coils are not available seprately. Thanks for posting. 

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