Brett:
Why do you need a close-up mat? You can probably get a sheet of 1/4 inch foam padding to glue to the table top and a nice piece of fabric to go over it. You can stretch the fabric over the table and fasten it on the bottom of the table with a staple gun, hot glue or strong tape. Alternatively, you can just lay the foam on top and put a tablecloth over it. It is significantly less expensive and your table can reflect your style through the material on top or the table cloth. For performances, I use
this table with a black striped table cloth. The built in padding and table cloth have the same feel as a close-up mat, but it looks so much nicer.