You can also try:
http://www.thundertiger4u.com
http://www.infinitehobbies.com
http://www.kangkeusa.com
http://www.bj-model-engines.com/home.html
http://www.richmondrc.com
http://www.modelrectifier.com
http://www.bphobbies.com
http://www.allerc.com
http://www.enya-engine.com
The Enya engine website above is actually for the manufacturer's web site in Japan. They offer an English version, however, along with an online store. My average delivery time with standard shipping from them is 4 days from Tokyo to Omaha. Also, Enya engines are very kick ass, so you all should shop there.