Searching for 34CplBS1 balance

A quick learner says:
Window(s) are believed to be M&W circa 2005. Then are single hung with tilt. The two small parts pivot and attachment around pivot that balance spring attached. The balance sheathhas number 34C pl BSL or BS1. Sash will not stay up and I need 8 of each.
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Paul from SWISCO responded:

Hi, thanks for contacting SWISCO. Your M&W windows will use our S795-34 tolt balance that comes with our 15-198 top clip attachment and 1-1/4" wide T-Lock shoe. For your sash weight option, you may choose the 34C option to correspond with the stamp printed on yours.

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