spiral window balances

A handy person from oklahoma city, ok says:

I'm looking for replacement spiral window balances.
This is the first time I've dealt with this.
I believe I have 5/8" balances but it looks like they measure 1/2".
They are 22" long.
They are going in aluminum, single hung, non-tilt windows.

I'm including a picture of the current balance for your reference.

I appreciate any help you can offer.

User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Good morning, Tom. Thanks for posting. I actually recognize this balance. Unfortunately, these aren't made any longer. Right now we've been using our Series 500 spiral balance with our 17-012 metal bracket as a substitute. Check out our S500-22 and see what you think. You may also want to consider our 75-005 charging tool.
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