Railway Semaphore 2 Weathered Low-poly 3D model is available on CGTrader for $39. Original author: dragosburian. Specs: 10000 polys, 23000 verts.
BLEND (Blender, filesize: 116 MB), OBJ (OBJ, filesize: 93.1 MB), FBX (Autodesk FBX, filesize: 93.6 MB), DAE (Collada, filesize: 93.2 MB), TEXTURES (Textures, filesize: 93.2 MB), PNG (PNG, filesize: 93.2 MB), STL (Stereolithography, filesize: 214 KB)