Window jamb liners

A handy person from New Jersey says:
We have Caradco tilt out double hung windows That are original to the house - 30 yrs. most of the windows work fine but we have 5 where the bottom or top sash slip down when you open them. And 2 of them have a bottom sash that slips all the down and won't stay open. We need new jamb liners but can't find anywhere that has them to match. We have 2 windows that are 65 inches high and 3 windows that are about 50 inches high. Can you help us find jamb liners?
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Tom from SWISCO responded:

We don't sell jamb liners, unfortunately. If these are wood windows, then a local mill work may be able to help you.

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