I'm trying to make tempura dipping sauce, but cannot locate dashi stock. Any suggestions?

I'm trying to make the dipping sauce for tempura. The recipe I have calls for soy sauce, mirin, and dashi stock. I have the soy sauce and mirin, but I cannot locate the dashi stock or anything even related to making the stock. Is there anything I can substitute that will still give it the desired flavor?I'm trying to make tempura dipping sauce, but cannot locate dashi stock. Any suggestions?
I usually use low sodium beef stock for mine.
i don't know where you are located, but dashi (in the powdered form) is usually found in any decent asian grocery store....you can buy it online though



http://www.amazon.com/s/ref=nb_ss_gro?ur鈥?/a>



http://www.asianfoodgrocer.com/index.asp鈥?/a>

I'm trying to make tempura dipping sauce, but cannot locate dashi stock. Any suggestions?
Here is a link to your recipe, but Im thinking if you can find these things you should be able to find the premade dashi mix. It is readily available in So Cal. Where do you live?

http://www.jfc.com/recipe.php?rep=dashi