Jim a new axle with flanges is about $175,
http://www.sturdybuiltonline.com/Tra...c_146-1-1.html , your spindle looks good enough to save. Your SS inner seal ring looks perfect. Had the same thing happen to me on Alligator Alley and the hub wore down the outside bearing's mounting surface about 1/16". Took some emory cloth and worked on the outside bearing surface until the inner race would slide on smoothly, put on a new hub, with new bearings and used it for another five years.
To answer Conner's question, yes it can, I've done it, however I can't remember if it was on an axle with a brake flange! The weld can be cut with a metal cut off wheel, the old spindle removed and a new spindle slid back in and welded in place. However the welding will burn off about 1" to 2" of galvanizing on the axle and we know what will happen in the saltwater world the trailer is dunked in.