AMP products has something that might work.
http://www.aftermarketproducts.com/catalog.php?mach_type=S#AMP-9904
AMP-9006 Arctic Cat Billet Gauge Cage
Having trouble reading your RPM’s and track speed on your ‘08/’09 M-sled speedometer? This mount relocates your stock speedo so it can be read while standing up and also acts as a vent to allow heat to escape from the engine compartment.
Chris Burandt says, "I put one on my sled earlier this year and I haven't blown a belt yet. It sucks the heat out of the engine compartment like a chimney!"
The Gauge Cage is mchined from aircraft quality billet aluminum, weighs only 6.4 ounces, and comes with all mounting hardware, drilling template, and complete instructions.
Fits: Arctic Cat ‘08/’09 M-Series or CrossFire sleds.
$119.95(USD) Click picture for larger image
I saw the vent you were looking for the other day. I'll find them and post the link.