Dresden Codex.

The edition from Fondo de Cultura Economica, 
Carretera Picacho-Ajusco 227, 14200 Mexico, D.F.


The complete works:  ISBN 968-16-1493-3
(incluces Spanish version of Thompson's commentaries)
Codex only:  ISBN 968-16-1510-7


Currently out of print.  Also, only the complete works now
available, (i.e. of the last reprint series).


I have found a copy in a bookstore in Barcelona, Spain.
Perhaps more copies are still available in Spain.
You can ask the bookstore:

Libreria Herder
Balmes 26
08007 Barcelona
Spain
Tel 317 05 78
Fax 412 27 02
(country code and area code is probably:  +34  3