Check out Medieval sarcophagi stone coffins tombstones crosses 3D model on CGTrader for $28. High-quality mesh by mistywind: 82347 polys, 41438 vertices. Textured.
FBX (Autodesk FBX, filesize: 8.24 MB), UASSET (UnrealEngine, filesize: 5.12 MB), PNG (PNG, filesize: 5.12 MB)