Don't Have a Large Router Bushing? Make One – It's Easy | Woodworker's Edge
Amazon.com: Rockler Router Guide Bushing Kit (11 Pieces) - Bush Router Guide Works w/Template, Pattern, or Jig - Router Template Fits Any Base w/a 1-1/4" Diameter Center Hole - Guide Set Includes
POWERTEC Brass Router Bushing Set with Case 71051 - The Home Depot