Hi Gerald,
There were a few different arrangements for the steering head in the veteran years, before the triangulation of the top of the steering head disappeared. I'm not sure exactly how many or the exact detail of each, but the attached images might give some idea.
I assume your 1911 has an arrangement somewhat like the Model B shown below. There are a few different lugs used in this arrangement, and I suppose they are either stamped or forged steel, like many bicycle lugs of the period.
There was a new lug for the 1912 model, and yet another by 1914.
Does your frame and the potential donor part resemble any of these?
Cheers
Leon