Freebird

Hi, I need to find a replacement cooler box for my 2006 Monterey 250CR. The original is an Igloo Marine Ultra 25 qt, but this is no longer available. Igloo do a newer model (Marine Contour 25 qt) but they say it is slightly different dimensions and they can't confirm whether it will fit my boat. Anyone know if the Contour will fit, or where I can still get an original Ultra 25? Many thanks.