Replacement Balance Coil

A handy person from Manasquan New Jersey says:
The coil was damaged and I would like to replace both coils. The windows are Thermal Gard 500 series from around 2007.

I also looks like I either need to use a spreader tool or make cut-outs to remove the coil housing balance.

Please provide part numbers and any guidance/instructions.
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Bob from SWISCO responded:

This reminds me of a 15-087 Pivot Shoe, which uses our Series 180 Coil Balances. Please compare, and let me know if you have any other questions. The image below shows how this assembly comes together as well as other accessories. 

Series 180 coil balance diagram
Series 180 coil balance diagram
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