Pokemon Vivillon Question

[Pokeyonekenobie]

So I'm trying to get all the Vivillon forms (and extras to have on hand for my nieces and nephews) and I have a UK 2DS and a US one.

My question concerns the Elegant pattern.  I've been looking online and some sources say that it can be found in the USA (no specific location setting to narrow it down) and some say France (again, no specific location setting).  But other sources say it is only available in Japan.  Does anyone know for sure if I can get this pattern without purchasing a Japanese DS?  The GTS is apparently shutting down in February so trading that way may not be an option for much longer and I know that my younger nephews will likely play X/Y or Sun/Moon after it shuts down so having a replenishable source would be nice.