sliding glass door rollers

A home owner from Round Hill, VA says:
sliding glass doors bottom scrape. believe its the bottom rollers.

Have tried to loosen screws along bottom edge of window. Unable to raise enough to kick out bottom to look at rollers.

I need correct directions and part #s. I would also like to find out about getting a screen for this unit.

sticker on frame shows

series 950
ANSI/AMMA 101-93
SGD-R20 / SGD-R25
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Paul from SWISCO responded:
The glass door roller assembly could be either our 81-078 or 81-086. The company used both. Check them out and see if either is a match. I'm afraid we don't sell complete patio screen doors.
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