@sezjuan, Comrade! If you want and if you have reason, you can try to buy the original SD-card in
the official store of the MAP-manufacturer. Or, you can try to search it in Google, using tags: "Mitsubishi MMCS SD Card Navigation +2016". Or find it and buy in ebay store. Probably, this card contains firmware (when buying, you should clarify this probable fact).
We are so sorry, but we do not have the firmware for your J-13 MMCS in our forum.