For the brazilian buyiers:
www.eurico.com.br (good one, I visited the store personaly in Sao Paulo)
www.s-shop.com.br (the larger collection you can find on-line, serious seller)
www.pegrande.com.br (never bought there)
www.brazilianorchid.com.br (for export, fine quality, designers)
www.sapato.com.br (ugly shoes, but they run large sizes)
www.aubottier.com.br (made to measure, good people, my favorite)
www.egle.com.br (new on the internet)
www.pedeanjo.com.br (don't like the styles)
www.fetishshiny.com.br (I know the owner, import shoes from order)
And don't forget the brazilian e-bay
www.mercadolivre.com.br. Sometimes is possible to find large sizes there, I have bought some.
Some are good for people outside Brazil. Brazilian Orchid is focused in the international market.