Check out THREE CASTER WHEEL TIRE WHEELBARROW PUSH TIP STURDY BARROW 3 KIT 3D model on CGTrader for $22. High-quality mesh by SURF3D: 201626 polys, 167548 vertices.
STL (Stereolithography, filesize: 9.61 MB), OBJ (OBJ, filesize: 18.3 MB), 3DM (Rhinoceros 3D, filesize: 29.5 MB), 3DS (3D Studio, filesize: 5.91 MB), DWG (AutoCAD, filesize: 9.06 MB), GLTF (glTF, filesize: 6.34 MB), STP (STEP, filesize: 18.5 MB), BLEND (Blender, filesize: 18 MB), SKP (Sketchup, filesize: 16.4 MB), MAX (Autodesk 3ds Max, filesize: 47.7 MB), DAE (Collada, filesize: 32.5 MB), IGE (IGES, filesize: 33.2 MB), SAT (3D ACIS, filesize: 23.3 MB), FBX (Autodesk FBX, filesize: 6.01 MB)