This might help, almost EVERY Wine & Spirits Store in Philadelphia carries at least 2 soju's 1 imported & 1 domestic. Some carry several.
Being that it is Korean was was banned in this country up until about 10 years ago it can be very difficult to find. It appears to mostly be found in Califonia. It does however show up on the fine wine and good spirits website. Search on there and try calling a few stores near you.
Unfortunately, they don't. I haven't found anywhere local that has flavored sojus
Thanks! Your answer is awaiting moderation.