The following is all in Portuguese. Even if you don’t read Portuguese, download the dictionary sample (see below), which contains pages from and into English. It looks excellent.
It is only available on paper and has to be bought from the author, who is in Brazil.
Fabio is impressed with the use of monolingual references as sources and the relative lack of non-specialist terms (which often take up disproportionate space in specialist dictionaries).
A PDF sample can be downloaded.
The author has a blog on legal translation.