Here is what appears to be a circa 1907 corner brace at a decent price, but plus shipping. Total cost reaches a cost-to-value level which makes one pause. Still, if you are looking for one...
http://www.ebay.com/itm/VTG-MILLERS...154114?hash=item5423387002:g:ExEAAOSwgQ9V08sw
http://www.ebay.com/itm/VTG-MILLERS...154114?hash=item5423387002:g:ExEAAOSwgQ9V08sw