Animated Delaware Flag Low-poly 3D model is available on CGTrader for $19. Original author: dragosburian. Specs: 4548 polys, 6286 verts.
STL (Stereolithography, filesize: 2.2 MB), OBJ (OBJ, filesize: 3.61 MB), FBX (Autodesk FBX, filesize: 2.32 MB), BLEND (Blender, filesize: 4.8 MB), DAE (Collada, filesize: 2.18 MB)