http://www.funaero.com/ also has some fun scale WWI kits.
And here's an English source in Japan for Tettra kits which build into some very nice looking models. I've seen the Me-109 at my field and it looked great.
http://homepage1.nifty.com/ishiimoke...ane/te_all.htm
And Flair models in the UK (with some availability through US distributors like Hobby Lobby).
http://www.flairmodels.co.uk/