just do a google image search on the flags get the image then scale it down to the
for Blattsalat flag the skin size is 256x128
for DaBro0zar flag the skin size is 256x256
such as, here are 2 flag iamges resized ready to use on Blattsalat's flag model.
Nato
North Dakota
many websites can be found with flag images. Afganistan I did a search on it and found 5 differnt national flags for that country alone