There are probably very few who 6mm game ASOIAF,  but if interested I have made files for most of the main Houses flags /banners ( at least for westeros )  you can find them on facebook  group  >>   

6mm fantasy wargaming 

they are in the files section,  they are all in pdf form 

The ones I have seen for sale tend to differ from the ones as seen on the HBO series,, I have tried to keep to the TV versions,, and of course they are all free.. Hope someone finds them useful 

Bri