1970's Alenco Sliding Glass Patio Door

A handy person from Birmingham, AL says:
Good afternoon!

I have an original Alenco sliding glass door to my patio on my house that was built in 1972. I replaced the bottom rollers but I still have one problem. There is too much play at the top of the sliding door and the door itself can be easily removed from the outside. Do you know what pieces I am missing that go along the top track? Do I need to install sliders or rollers? If so, what would be the closet fit in your inventory. Thanks for the help!
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Dave Sr. from SWISCO responded:
I can't say for sure. You might be able to use our 80-045 top guide, but that's just an educated guess. If you can, send us some photos of the door and the track so we can get a look at it.
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