are non modular cylinder still available

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Schlage has released a modular cylinder sales kit, part number 40-224.  It's contents and information can be found here.
Click here for a list of available Schlage cams comparable to the Sargent 13-0660.
See descriptions for the 09-992 thru 09-997 parts kits for modular mortise cylinders.  The 09-998 is a kit for a rim cylinder.      
We have completed our transition to the modular design and no longer have the old design.
The cams for modular cylinders are unique and are not compatible with any non-modular mortise cylinders, Schlage or any competitors.
The following list of cylinders were not affected by the change to modular cylinder:    09-900, 09-904, 09-905, 09-907 mortise cylinder turnsSmall format interchangeab...
The Schlage L-Series uses a clover leaf cam with the exception of the L9060 outside cylinder which uses a straight cam. The cam part number will depend on the type of mortise cylinder, keyway (for ...
A modular cylinder's length is determined by 4 basic parts; a cam screw, cam, plug extension, and a back housing.  Most of these parts are used in more than one cylinder length and...
Modular cylinder was launched July 26, 2010 and replaced the standard key-in-lever, mortise, and rim cylinders.     For a list of cylinders not affected by the modular cylinder design change cli...