My 3-D printed replacement parts will get your Panasonic FZ-G1 Toughpad back in shape. I drafted these in FreeCAD due to necessity; our tablets taking a beating and the IT budget is questionable. Also, no one seems to sell replacements for the pieces that seem to break the most: the vent, antenna, and SIM slot covers, and the little tab that holds in the bottom of the battery. These have been tested on the Mark II and Mark III FZ-G1s, and I assume they fit on the other models as well. If they don't, I'll give you a refund.
These ABS parts have been field tested by EMTs and Paramedics, who ironically have a healing touch for people but destroy every piece of IT equipment they approach within 10 feet of. The fact that I haven't been printing up replacement parts for the replacement parts should give you a good idea of how well they hold up. And while they certainly aren't officially weather sealed, they do well at keeping out the rain.