keyed lock cylinder for "older" Andersen patio door

A home owner from Fleetwood, PA says:
Need to order a replacement lock cylinder and want to make sure I order the proper part.
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Casey from SWISCO responded:

Hello,

Take a look at our 82-319 Andersen key lock for a right-side door panel from outside looking in. Thanks for posting! 

82-241 : Andersen Thumb Latch Lock
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82-318 : Andersen LH Gliding Door Key Lock, Bright Brass
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82-319 : Andersen RH Gliding Door Key Lock, Bright Brass
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