Anderson DH window balancer

A home owner from Tonawanda NY says:
Balancer is broken on the LHS of my Anderson DH window. The string does not retract for the lower window, probably because the tension spring is broken?

Can I purchase a replacement balancer for the LHS?

both sides are numbered 11600-17
LHS has E47 9#27 10-86
RHS has E52 9#27 12-86

require one (1) replacement
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Paul from SWISCO responded:
Thanks for posting. Please take a look at our 24-939 Andersen Sash Balance. This can be used to replace balance boxes with the stamp 9#27.
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