tdinovo

Hello, I'm trying to cut out a hole in a table to mount my router plate in. It's a woodhaven plate and I don't want to cut a through hole for it. I want to cut a rabbit out for the plate to sit on. I'd like to use guide bushings to make a template from the router plate then transfer that template to the router table. I'm having a bit of trouble determining the proper bit size and bushing sizes to do this. Is there a combination that will allow me to transfer the outside diameter of the router plate to the inside diameter on the template and then back again?

Thanks in advance!
T.