Flaviar is a great spirit-lover's resource.
I originally learned of Flaviar when my wife got me a subscription to their Bourbon of the Month Club. Over 18 months, I received a new bourbon each month, only one of which was already familiar to me. I had to drop my subscription for a while because I was just building too much of an inventory backlog (my wife's words, I'm not sure I fully understand the concept of "too much Bourbon.") Getting to know the company through this club membership, I began finding hard-to-find spirits at quite reasonable prices. I find it an invaluable source, and I particularly enjoy their "Flavor Spiral" liseted with most, if not all, products that helps you identify your targets. And I need to mention that their customer service is top-notch, as well!