The latest version (v1.20) of the unofficial KPA Editor by Damian Greda has added an 'Inverse Cab Lock' feature which allows for quicly locking everything in the Kemper except for the cab.
In conjunction wih the Offical Rig Manager, one can simply select an existing Rig in the Rig Manager, activate the Inverse Cab Lock in the Editor and peruse through the cabs in the Rig Manager (including those in the Rig Exchange!
Full featured overview of version 1.20
Direct link to how I accomplish 'pseudo' Cab Management (with imported IR's and Studio Profiles!)
Thank you Damian!