10B stamped channel balance

A home owner from Rockledge, FL says:
Hello,
I really like your website and store. I've replaced several of my channel balances with your products. All of my windows have been of the 380 series. I have a small window in my bathroom with the channel balance stamped 10B USB. However, the sizes you have for the S380 series only go down to 13". Do you have any ideas of what I can do for this window? Thanks!
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Tom from SWISCO responded:
We can most definitely help, but it will need to be a custom order. Before we begin, can you just tell me how many you need? Once I have that, I'll email you a custom product to add to your cart, in addition to a price quote.
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