I made these axles from high tensile bolts I beveled the tab holes and welded them.

Tom http://s10.postimg.org/4u0kluwm1/axle.jpg http://s22.postimg.org/u5z9u1i75/axle2.jpg http://s9.postimg.org/ynqty94e7/axle3.jpg
http://s14.postimg.org/3pgj5pchd/axle4.jpg