Andersen window sash balancer 11L & 11R

A home owner from Pittsburgh, PA says:
Hello,

I have 1994 vintage Andersen double-hung windows, Style 2862 with 5/8" low-E HP glass. There are two sash balances per window, with one marked 11600-17 11L 2 BU52 0394
the other: 11600-17 11R 1 BU53 0394

Can you advise a Swisco catalog number for the replacement? I've looked through the website and the discussions, but not seem to have found anything about the 11L and 11R sash balancers.

Thanks
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Tom from SWISCO responded:
Thanks for posting. We believe that we have located a possible replacement. We will post again in this thread as soon as we have more information available.
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Casey from SWISCO responded:
Please see new SWISCO product codes 24-11R and 24-11L for the needed replacement Andersen balances.
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How to replace an Andersen Window Balance
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