Window coil balance & Extra Large Vent Lock

A quick learner from San Gabriel says:
I am in need of replacing the window coil balance on both sides of a double hung retro fit CertainTeed window as well as numerous Extra Large Vent Locks if you have them. I think I need the whole assembly because one side is completely broken and the other is getting there. The only number I could find associated with these parts is on the plastic piece that holds the coil. That number is 86180790. I have been unable to find any numbers on the side of the windows nor the coil itself. Hope you can help. Thank you.
coil balance
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Mike from SWISCO responded:
Thank you for reaching out to us. Please begin by taking a look at our 26-148 vent latch as well as our Series 170 col balance. If these do not appear to be a match for you, get back to us with some measurements.
A quick learner from San Gabriel, CA says:
Thank you so much for getting back to me. It looks like you have exactly what I need. One question, can you tell me where, exactly, on the broken coil balance I might find this number stamp? Should I unravel it completely to find it? It's pretty tough to unravel but I will do whatever is necessary. Thanks.
A quick learner from San Gabriel. CA says:
Do I have to entirely unravel the broken coil balance in order to find the number stamp? Can you tell me where this number stamp usually appears on the coil? If I still cannot find the number stamp do I then have to send you the measurements of the coil, of the entire window or what? Thank you for your assistance.
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Paul from SWISCO responded:
The number stamped on the coil is near the screw hole the the spring attaches to the pivot shoe. Let me know if you can't find it.
A quick learner from San Gabriel, CA says:
Thank you, Thank you, Thank you !!! Found the stamp and ordered the parts. So, we'er off to the races. I appreciate all your guidance.
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