If you can't find an exact fit, just get one that fits your needs. You can unscrew the mounting hardware from the deck and reposition the hardware to fit your new cooler dimensions. Just be sure to seal the old holes (and the new ones) with 4200 or 5200 when you are done. I just moved one side of my hardware (less than 1/2 inch) to fit the new cooler when I replaced mine last spring. I went with a 70 qt Coleman (non-padded top) from Wal-Mart.