The 7-11 items were only legitimately made available in Japan via special downloads distributed at 7-11 stores, so they are very rare.
The 7-Eleven Set is a Distributed Item furniture series in the Japanese version of New Leaf and Happy Home Designer. The set contains eleven items released in three waves: the first wave featured the first five items and was released between December 1, 2012 and January 3, 2013; the second wave...
animalcrossing.fandom.com
I don't have any, unfortunately. I just wanted to put into perspective how rare they are.