Window hardware assistance

A quick learner from Indianapolis says:
I have a home built in 2005 by Davis Homes in Indianapolis Indiana and am told they used Andersen Silverline single hung vinyl windows. Andersen now says my windows are NOT their Silverline windows.. They did give me your companies name as a possible source for help in finding the parts I need to repair my windows. I would like to get side balances for 15 windows (both L&R). I have included several pictures of the balance needed. The only stampings on the metal balance cover is "34B , BS1, RA." I hope you can help me with these parts and or help me find the correct supplier. If you need any additional info from me do not hesitate to contact me.

Thank you for your help.
User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for your patience, Jim. We should be able to replace this balance, though it will have to be a custom order. Thanks to your information and pictures, we have all the information we need to get started. Could you just confirm exactly how many you need? 15 windows would equate to 30 balances, but I just wanted to confirm. Once we have that, I can send you an order link and price quote.
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