http://onlinemilitaria.com/Don't know why, but they don't actually have "what price glory" in their web address, but I can still find it with a search, among all the movie references.
I looked into some of the Russian and other surplus, but....most didn't have sizes large enough for me. Not saying NONE of them did, but a couple that I called didn't think they had any big enough for me. So I just made mine. Was already used to making(trying to make) uniforms, since nobody in the world seems to make 19th century French white fatigues.
Edit: To find the navy uniforms on WPG, look under "new arrivals" US. As I noted before, the white middy is too short, but the blue uniforms are longer, just need the drawstring in the bottom of the shirt to make it correct for the 1913 regulations.