There is a rather consistent connection for Ketamine in e-town, Alberta, Canada. As mentioned previously a visit to your local rave/after-hours scene should produce "something" being sold as "K", however again as mentioned previously unless you knew the source or dried it yourself there is not guarantee as to how much/what it's cut with, and I can pretty much guarantee that it won't be 100% ketamine, as it usually isn't only ketamine desolved in distilled water in the vial anyway. This coming time of year as Uni/college lets out a more definate source would be the summer festivals. I personally suggest this to an extent over rave purchases only on the matter of harm reduction. In that your more than likely to re-connect with trusted psychonauts or know someone who knows someone with "confirmed" Ketamine in such a setting. Only caught is that such a hook up won't last. Although personally I like segmenting Ketamine into the breif 1/2 to 1 gram indulgence, as apposed to the all consuming 8'ball every couple of weeks (or for some even days) type usage. Thus for such minimalist/infrequent use summer festivals might be the best solution.
-Best of luck and remember, just because Lilly says it's the shiznat doesn't mean it can be enjoyed without consideration for moderation.