Keypads are tough. :-(  Several years ago I needed a
membrane keypad for
 a commercial design, and I found a good company in Florida who did a very
 good job on them.  They're still...membrane keypads, though.  Eeew. 
    There are companies ("Fourth" came to mind, I used their products many
times) that produces real keyboards (beyond membrane and chiclet ones) in
Brazil.