After getting it all apart, I picked up a new board from the lumber yard. I had it cut to size and then rounded the corners and sanded the edges. I put in the recommended 3/4" holes for drying the foam.
We cleaned the vinyl and then I hit the foam with Lysol to kill any mold that might still be there. It's ready to be reassembled once the vinyl dries from the cleaning.
Total spent including buying a staple gun is about $120.00. Losing 4 gallons of water in the heat = priceless!
More pics when it's finished tomorrow.