Handle missing knob to lock patio door

A handy person from Easy windsor NJ 08520 says:
May 26, 2017
No sticker or part or brand on disease of door. Original was put in by builder in 1999
Patio handle
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Tom from SWISCO responded:
May 30, 2017
Is the missing thumb lever the only thing wrong with this lockset? If so, see our 82-107. This may be all you need.
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