I copied this from another board, it has some useful information. Keep in mind I am only passing the information along, I have never had a key made but i am thinking about having a couple key knobs made for the gas tank and the right pocket. The 27R blank is too short to use in the ignition. I have seen Honda key blanks for sale on Ebay, if you had one of them you might get someone to cut it for you somewhere, might have better luck getting it cut at a locksmith than a hardware store if you order a blank.
"The Axxess #27 key blanks bought and cut at Home Depot. There has been discussion about using the shorter 27R blanks, but I have never used them so I can't comment. I can say I have had 6 #27 blanks cut at Home Depot for my 2001 and the 2010 and they have all worked perfectly for the ignition and the fuel door and right pocket:"
I don't know whether this link will work or not but will try to post it.
How to make key-knobs for the fuel door and right pocket