Are there only two items sold in the front corner of Nooks Cranny?
From what I understand, that front spot is meant for seasonal items, and for the current season there are two items that can be bought: the retro fan and the surfboard, as you said. Even more annoying, Nook's will only sell one color of each during the entire season, even though there are several colors available. To get other colors, you'll have to travel to other people's islands and buy from them.