Mister Pig
Pigamus Maximus
Actually,there are good cost savings to be had. The cutters are available at any craft store for less than $15. Producing the label indent is only limited by your own creativity,which,last time I checked,was free.So,for $45 all in,I now have three platter mats for less than the cost of your option,which is one mat for $59 plus shipping/taxes. Mind you,I have more than 1 table,so none went to waste.
Now that I think about it I have a large contractors compass that could make a circle that big. I could put my Exacto knife in it and put a fresh blade on it for a clean cut. It would mark the center that way also. That could work out OK.