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!