This symbol is fictitious and is useful only to facilitate visual identification of some articles within Wikipedia. This symbol has some visual elements that are similar to its official counterparts, such as colors or some shapes, but they are NOT official and don't have any direct relation to the official source.
The official symbol cannot be uploaded to Wikimedia commons because they are protected by authorial rights (copyright); in this way, if you want to localize the official symbol, try to contact its official source and ask for the official symbol and a possible license of use for your purpose.