Kreg Precision Router Lift in the Router Parts & Attachments department at Lowes.com
Woodpeckers Precision Woodworking Tools PRL-V2-420 Precision Router Lift for PC 7518 Router with Standard 9-1/4-Inch x 11-3/4-Inch Plate - Router Tables - Amazon.com
Rockler Pro Router Lift (8-1/4'' x 11-3/4'' Plate)