He also got one from the convention:
http://www.thechipboard.com/index.cgi/md/read/id/1345177/sbj/we-just-got-back-home-today/

The picture you show has the sign saying "Han Kook Market".
There are probably dozens scattered throughout California.
I found this sign from google that says "Han Kook Super Market":

The chip has a $ sign so it wasn't used in South Korea.