Easy storm door and bedroom fanlight fix? i have a storm door that is suppoed to hold a sliding...

i have a storm door that is suppoed to hold a sliding glass window within the bottom that slides up to open, im sure most everyone has see these. my problem is that i am missing the sliding glass completly. the door does not have a factory owner printed on it so i dont know where to go for parts. other after that the door is in great shape, and to buy a whole other replacement door would cost roughly speaking 200-300 dollars due to its "special" height. does anyone know of a way to fix this? or a track to buy replacement glass? i also have a bedroom glass in my home with equal problem, sliding glass is completly gone. and i would love to find a solution to that as well, any sustain would be greatly appreaciated.
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Answers:    if you still have the frame you con get cup or plexi glass cut to fit. if not home depo or lowes can instruct the frame with the measurements
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I would just own a storm window made to overlap the window you very soon have in the storm door. Screw it on the outside and caulk down it.
As far as your window in the bedroom- Remove the sash specifically missing the glass-and take it to a glass shop- they should know how to cut and install either insulated glass or regular chalice, whichever you have.