Need replacement pivot boots for Traco windows

A home owner from West Virginia says:
I have several pivot boots that have broken and need replaced. My sashes say Traco-1-77 inside of them. The pivot boot is a white/cream color. It is 1 1/4 inch wide, 2 inches tall, and about 1/2 inch thick. It has Patent 3,055,062 stamped on it with a 3 above that. No other distinguishing marks. Thanks in advance for your help!
User submitted photos of a pivot shoe.
Profile picture of Paul
Paul from SWISCO responded:
From the information you gave, the windows were made back in 1977. It's pretty good that your pivot shoes have lasted that long. Traco discontinued your pivot shoe and has replace it with the 15-015, which is ultimately a stronger option. You might also need our 75-006 charging tool to make it easier to reinstall your spiral balances.
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