For me I'd have to take a good 40-minute drive to the nearest Asian grocery store (which is questionable for stock and price), so I do with what I can get from mass chain supermarkets. I'm yet to try
efooddepot mainly due to postage cost considerations but they have a
huge selection of items. There's always eBay too (but again, postage costs always must be considered).
If you get Kombu but can't get any Bonito Flakes, I can give you Hideo Dekura's shiitake dashi recipe, it's
very simple but a good base!
You posted my absolute most favoritest favorite Sanrio character ever
Poor Kuromi-chan, always getting the fuzzy end of the lollipop