Dennis,
The little horn may be custom made but I recognise the big horn as a style being made in, I believe, Mexico and imported by Dixie Gun Works in the 1960s. Dig out one of their old catalogs.
I used to buy them and rework them--they came in several sizes and with and without the turnings. They were a good, inexpensive source of a cow horn back when raw horns were hard to find.
Gary