Source for bigger filament spools?

Hi Anyone!

I just asked me if there is some place to get filament on bigger spools, like 2kg or more.
I think larger spools should be less priced/kg than the 0.75 or 1 kg ones.

I remember seeing 2,2kg spools somewhere. Not sure where it was but it was just a few cents you could safe.
I don’t think there’s a way to safe money by buying 10-20kg. igo3d sold 6kg for the price of 5kg. But that was month ago.
Cheapest Filament i know is esun for about 13,50€ - 16,00€ / kg