I’ve tried this recipe on Wikicooks, and it turned out pretty good considering that I had neither a gas stove nor a wok at the time. The sauce is pretty simple: it’s just some oyster sauce, rice wine, and soy sauce. I can virtually guarantee you thatt you’ll be able to find the first two in the same place you’d find soy sauce at the store. Some places even have pre-prepared kung pao sauce, so you might want to try that too.
Finding dried chilis, though, that can be hit or miss. I’ve been able to find them at maybe 1 of every 2 grocery stores I’ve been to in the last few years. I got away with using red pepper flakes. Also, I don’t know how good you are at cooking chicken, but I had to marinate it for much longer than they said to prevent it from having the consistency of soggy pine.