JessEm Router Table Insert Plate | Viking Mountain Tool Works
DCT Universal Router Table Saw Insert Base Plate Kit – 3-7/8” 2-5/8” 1-1/4” Inch - Walmart.com
I built a router table insert for my convertible saw station/modular workbench. It replaces the table saw on the short end of the workbench (Gallery in comments). : r/Workbenches
Precision Router Table Insert Plate - Undrilled | KregTool.com Official Store
Router Table Insert Ring Set (2" OD) Fits Sears & Craftsman - Multiple Sizes | eBay