I think all litigators in Spain must be part of their local lawyers association. So you may want to contact the "Ilustre Colegios de Abogados de Madrid" and leave a message for him there. However, I doubt they will give you his personal information, but you can try: http://www.icam.es/index.jsp

If you know his lastname you can use the Spanish white pages: http://blancas.paginasamarillas.es/jsp/home.jsp

Hope it helps!