Just to close the loop, I went to Super H Mart in Naperville on Friday afternoon and struck out. Then i went to Asia Market, also in Naperville, and they had memenori!
In case anyone cares what i did with the mamenori, here is tonight's creation...

I called it Q-Shi

From left to right, Pork Chop Nigiri with Lime-Wasabi glaze, New York Strip Nigiri with Horseradish, Chicken Breast Nigiri with Citrus-BBQ sauce and BBQ Maki with all three meats, cucumber, avocado and BBQ sauce.
Asia Market
1512 North Naper Boulevard
Naperville, IL 60563
(630) 955-9189
http://asiasuper.com/
...ron