Self made, based on <a href="//commons.wikimedia.org/wiki/File:Vitkov_OP_CZ_flag.gif" title="File:Vitkov OP CZ flag.gif">Image:Vitkov_OP_CZ_flag.gif</a> from <a rel="nofollow" class="external text" href="http://rekos.psp.cz/detail-symbolu/id/e3afbdf3-8290-43c7-a500-f2b4a1649ad2">REKOS - official database of municipal symbols at website of Chamber of Deputies</a>