Research chemical websites are usually now policed to the point where they largely no longer exist. Even though 2-ci may be legal, it is probably easily prosecuted under the Federal Analog Act (If you live in the US). A few profit-minded youngsters ruined the whole research chemical game by marketing tryptamines and phenethylamines online a couple years ago. I remember not too long back when we would all just order from Sigma-Aldrich (From whom you can get almost any chemical known to man) and they did so much volume that there was no way the DEA could police it. If you are pressed on trying it, you should look up Sigma Aldrich. I am not sure if they have an easily-navigated website, but they will send you their catalog if you request it. It is a daunting list of hundreds of thousands of chemicals, but I think you get a little peace of mind from ordering from a reputable company, who actually markets to labratories and Scientists rather than exclusively to budding psychonauts.
However, I must give a bit of advice. I am not sure how experienced you are with research chemicals, but you should always move forward with extreme caution. Before anything, you should do exhaustive research on it. I have used a couple of related phenethylamines (2-CB, 2-CT7), but have no experience with this particular analogue. Good places to start (and I always recommend these sites) are erowid.org, and lycaeum.org. It might not be a bad idea, if you intend to explore other chemicals as well, to pick up a copy of PIHKAL. (PIHKAL is a book by Dr. Alexander "Sasha" Shulgin, who very likely invented 2-CI). The second, and more important thing to consider if and when you go through with your acquisition of this chemical is.... MAKE SURE TO ACCURATELY CONTROL YOUR DOSE!!! You will usually buy chemicals like these in increments of a gram or more, and the active dose is often under 20mg. Trying to eyeball 20mg is a silly and impossible task. I have had very bad experiences with over-dosing through eyeball portions, and when you are using a poorly-tested chemical, you run the risk of having fatal results. Do everything you can to find access to an analytical balance that reads to 1mg. These are quite expensive, so it will not be an easy find, but it is very much worth it, and will keep you from trying to evenly split off 1/50th of a pile of powder.
I hope I shed a little bit of light on this subject, and I wish you the best of luck. Sigma Aldrich is probably a good bet, and I hope they work for you. I ordered from them many times many years ago with much success. I don't know if anything has changed over the years, so go out and look it up! I hope I have helped at least a little bit, and good luck!
S-Town