Kinco top sash guides destroyed by sun

A quick learner from Lutz Fl says:
I Have a customer w/several Kinco windows that have a broken top sash guide 18-166. these are plastic and the sun hase destoyed them .would the nylon 18-044 nylon fit and last any longer?

Thanks, Bob
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Paul from SWISCO responded:
I'm not sure if another plastic part will hold up any better, to be honest. You might want to consider our 18-010. I think this could possibly work as a substitute if you only use the top hole.
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