Broken pivot shoes and pivot bar

A handy person from Boston says:
Hi, I have three broken pivot shoes and one broken pivot bar. They are used with some sort of double coil balance. I'm having trouble identifying what sort of replacement part to buy. It looks like at some point someone may have replaced these with either pivot shoes that were too large for the track or pivot shoes not made to be used with a double coil balance, as large screws are drilled through the shoes to secure the coil. Help would be greatly appreciated!!
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Paul from SWISCO responded:

Starting off with your pivot shoe, take a look at our 15-175. Look over the measurements to determine if this is the right match. As for your pivot bar, a couple of parts come to mind: our 26-226, and 26-352. Loo over each part. Pay close attention to the hole placement. See if any of these parts could make a for a good match. 

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