2007 arctic cat

I want to swap out my key or add a tether to my 2007 m8, anyone know where I can get a kit or how to do it myself? I cant find any other forums for 2007's, and the arctic cat parts website only has tethers for 2008 m8s, does the one year really matter? My 06 M7 had one so it seems strange that...

Just trying to get my 2007 m8 tuned. Im running a D&D y pipe and pipe, paired with a speedwerx can. Ive also got a 4" air intake. Just wondering what anyone else with a similar set up (full exhaust and/or intake) is running, or if any one has suggestions. Oh yeah and I run in higher elevations...