What happened to Jesse James's guns after he was killed and where are they now?

The last known owner of Jesse James' guns was a man named Bob Bidwell. Mr. Bidwell received the guns after a will dispute where the guns and the spurs were separated. My family currently is in possession of the spurs. Mr. Bidwell on the other hand got the guns. Apparently the gun was described to me by my grandfather who said it had notches in the handle. I have seen the spurs and they are in Excellent condition. One of them still has the leather.