26H BSI Window Balance / Parts

A quick learner from Elk Rapids, MI says:
Hi,
Hoping you can help me out - I'm repairing a double-hung window and need to replace two of the window balances - one is marked 26H BSI and the other is 30F BSI - I haven't been able to find any comparable balances with the same S-hook on top and "u" clip on the bottom (I think you can see both in my photos).

I'm wondering if I'm going to need the nylon pivot shoes as well?

Please advise - much appreciation in advance.
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Tom from SWISCO responded:

Thanks for your patience during this busy season. We can supply this balance, but it will have to be a custom order due to its configuration. That bottom hook is not standard but we can make it here in our shop.

Before we go any further, can you tell me how many of each you needed? Once I know that, I can email you a purchase link and price quote that you can use to place an order on our site.

Concerning the pivot shoes, you can reuse your old ones as long as they're in good condition. The balance we'll be making you will be fully compatible with the originals.

Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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