1st stop: Joann's for 5 yards of 2" thick foam. Luckily, they come in 2.5 yd sheets, so I only needed to trim 4" from the length of one piece to fill the table between the rails. I had a 50% coupon, so the foam came out to about $70. I also grabbed 3 yards of clearance vinyl to protect the existing cover, for a whopping$9. I inserted the foam over the vinyl cover, between the rails.