I refuse to pay $10-$15 for a single blank..
I went on eBay and did a search for the partnumber for the C-Series keys and found a pair of the blanks for $5 plus $1.90 shipping.
my eBay app won't give me the option of copying a link - so if you are interested just search on ebay for the following:: Arctic Cat Keys Blank C SERIES P/N # 3409-007
I took the keys from both machines to a local locksmith, they had the blanks. it was less than one factory key to get all 4 cut. If you look at the factory keys (both ignition & glove box) they have a number on them, write it down if you loose all of you keys you can order a replacement which is cheaper than replacing the ignition switch
I checked with my local LockSmith first.. He said that the C-Code key blanks that he had were a 1/4" longer and had a different stop on them.. With some fiddling and filing, it could be done but he advised me to just get the blanks and he'd cut them.. I'm taking his advice, but thanks for yours as well..