>>/20775/
>>/20777/
Theoretically the image could be posted somewhere here (or uploaded as a banner or custom flag or whatever) then deleted. Since all files get put in the database and they are not immediately purged, the link will remain working (until it is finally purged, don't know the timelength but it may be months or forever, there are images whose posts were deleted more than 3 months ago and are still alive; example: /.media/b21d5bfef1c4770e435c17763a58fb4b-imagejpeg.jpg)
To do this it would probably be less tedious to make it a single image with each flag as a tile and then use the appropriate offset in the css (there are tools to automate this too).