okay well i have some pics of the coolers i was talking about, first cooler was a custom built one. it messures 53" long 13.5" wide (outside flange to outside flange) cooler width is 3" and the center between the coolers is 9" price for this cooler is $150.00 heres the pics
second is a cooler from a 2008 xp 800 this cooler messures 65" long and 10 5/8" wide and will require a hole cut in the top of your tunnel 65" long and 9 1/4" wide, this will be a very custom look i think but might be hard to fit right? here are the pics price for this cooler set up is $275.00
i do have various other stock coolers like the running board style that are on the 2000 + polaris sleds they messure 41" long with a 6" tube at each end for a total length of 53" here is a pic of those,price is $100.00 each side
if you like this last idea i also have the rear cooler to make the complete set (both sides and rear with rubber hoses) $300
let me know