A reader saw a post I wrote a few months back on how to open a durian fruit and asked, "Where can you buy fresh durian?"
Well, the answer is pretty easy; if your town has an Asian supermarket or an Asian neighborhood like Chinatown or Little Saigon, you'll find it there. It may be in the freezer section, however. Most markets freeze durian because it helps preserve their shelf life and cut down on the strong odor.
If your town doesn't have any Asian markets, I suggest going to your local Chinese, Vietnamese, or Thai restaurant (if applicable) and inquiring if they have sources for buying durian and getting it delivered to you.