This would be easy since you are willing to cut the N810 plastic and take the SD card out of the case. This is more of a hacker’s version and can be done. I would make such a version if at least 20 people wanted it at about $25.00 each. This is what the circuit boards would cost with shipping. I already have a design in my mind. It would need a PCB but you would have to solder the card in. Let me know it would make a good hackers project.