Parts for 34B BSI DL balance and window

A quick learner from Davidson, NC says:
Need new balance's where the string broke, pivot broken and bottom of window pin that goes into pivot broken. Trying to find parts to repair.
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Bob from SWISCO responded:

Thanks for posting. Your pivot shoe looks a lot like our 15-129; you'll need to remove it from the window and compare dimensions to confirm. Your balance might be a S770-34, with a stamp option of 34B; but again, look over all the specifications to make sure this looks right. Finally, there's a few possibilities for your pivot bar. See the 23-021, 26-310, or 26-360. Look over the dimensions to confirm.

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