Replacement for coil retainer / cap

A home owner from Fort Collins, Colorado says:
I have a set of "Pacesetter" vinyl windows from the mid-1980s. Various parts have broken, including what I'd call the coil retainer / cap. Photos attached. Do you think that your part 15-144, (perhaps with parts 15-143 and 15-145, if needed) will replace the broken part? One image shows the complete coil assembly and the other the broken part on it. Thanks in advance.
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Tom from SWISCO responded:

Hello! I agree, I think those three parts, working together, will work perfectly well for your window. They're designed to be compatible with the Series 152 coil spring, which I believe you're using right now.

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