Animated Latvia Flag Low-poly 3D model is available on CGTrader for $19. Original author: dragosburian. Specs: 6286 polys, 4548 verts.
STL (Stereolithography, filesize: 2.2 MB), OBJ (OBJ, filesize: 3.02 MB), DAE (Collada, filesize: 1.88 MB), FBX (Autodesk FBX, filesize: 2.03 MB), BLEND (Blender, filesize: 4.5 MB)