Broken pulley in channel

A quick learner from Florida says:
I have a kinco window, picture attached. The markings on the 29" long by1/2" wide channel are 28 o of BSI
Can you tell me the replacement part number and price please?
I have ordered parts before from you.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Start by looking at our Series 385 channel balance, I think this could be what you need.
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