I'm afraid I don't but a couple of ideas...
Try googling the phrase you want in Portuguese plus the word for rubber stamp (carimbo?) and see if that gives you anything useful.
Use a computer and printer to make your own sentiments if you can't find what you need.
- You can print out and use punches or dies to add the sentiment on its own interestingly shaped panel if you don't want to print directly on the card base
- If you're making something in a slightly grungier style where printing looks a bit too pristine, you can print out mirror image on the shiny side of acetate sheet, flip it and rub with something like a craft stick to transfer the ink to your project (sample of that technique on a postcard attached so you can see what it looks like - I added some doodling with black and white pens to this as well).
HTH!
Portuguese Stamps
