Where to buy Chinese oolong tea?

Oolong tea can be hard to obtain in some western countries, as it is less popular than black tea. However, it is widely available by mail-order, including numerous online retailers. Also, some specialty tea stores have good selections of oolong, if you are lucky enough to live near them. Lastly, one of the best places to buy oolong can be in Chinese stores or other Asian stores--owing to the fact that oolong is most popular in China and Taiwan.

I've attached a link of a site that lists a large number of providers of oolong tea. You can also find tea companies that sell oolong by simply searching the web for "oolong tea", or typing in certain named varieties if you know what kind of oolong you are looking for.