David - you haven't said what the insert was made of. If you're happy with it, I wouldn't be too concerned about the holes, and I certainly wouldn't toss it. If you don't have another router, you'll likely get one at some time, then you can swap out router and plate without having to change anything in your table of having to change the router on the plate.
When you get a chance, update your profile and include some of the tools you have and your general location - this will help the members here help you and provide more specific detail for you, knowing what you have available and where you might be able to get what you need. Providing help or answers to someone in the UK or Europe is going to be different than for someone in North America.
Some folks call me Vince - other folks call me...........
Last edited by vchiarelli; 03-20-2018 at 02:46 PM.