Gracias por la ayuda!

If it doesn't have to be exact (I'm not sure about that "a") you could substitute in
Helvetica, Arial, Akzidenz Grotesk or even the MS-Window's font - Tunga Bold Oblique...

Thanks!!!
I've the same problem with that "a", but you're right... may be I can replace the font.
Thank you and sorry about my English!