ebay/amazon would most likely be your best bet. Lucky Supermarket and superstore should have most of what you need for Japanese foods. Maybe try Wasabi at home, Neptunes for fish. 

I've been looking for a Bluth Cornballer for a while -- no success. 

Does anyone know of a store in Winnipeg where I can buy an electric takoyaki grill?  I'm having a few people over for takoyaki soon and my puny grill won't be able to keep up, so I'd like to get another one.
Feel free to chime in about any places to get good Japanese ingredients/goods too, but I'm really after that grill!

Electric takoyaki grill for sale in our fine city?