Replacement bottom track/guide for Alenco windows circa approx. 1990

A home owner from Littleton, CO says:
Hello -

My Alenco windows are in good shape, but the bottom window guides/tracks are in rough shape from sun and age. I'd like to replace them on about 8 windows in the house, but I can't find the part. Any help would be greatly appreciated.

Best, Lisa
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Casey from SWISCO responded:

Hello,

We don't carry an exact replacement for your track but take a look at our 55-027 and 55-072 to see if the dimensions of either of these options might work for you. Thanks for posting! 

A home owner from Littleton, CO says:
Thank you for your response. I don't think these will work. I measured the width at 7/8". I think this is going to be a harder match than I anticipated! I do appreciate your looking it up for me. Best, Lisa
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