The place to start would be the American Brabant Association. There are about 20-30 breeders in the US and they produce 50-75 full and partbred foals a year. Brabants are short, stocky, heavy draft horses and would never make a jumper. They are bred to plow and move low and slow. A Spanish Norman would make a terrible jumper as well.
If you want a Brabant and can not find or afford a full blood, you should go with a smaller, broad, old style Belgian mare. Breed her to a Brabant stallion and you will end up with a foal that is recognized by the Association. Brabants fall under the Belgian Draft Horse Corporation.