You can find some great vehicles here in the Market place, and if you want some free ones look in here:

http://dmi.chez-alice.fr/modelsvehicle1.html

Also I found a Japanese Zero here:

http://jazy.eek.jp//indexdl.htm

And some other Japanese vehicles and equipment in the download section here:

http://www5d.biglobe.ne.jp/~oedo_s/neo_oedo.html

Ask me a question, and I'll give you an answer.