Only thing I could find was on this page:
but you gotta register to get the link. Definitely not my language and Google Translate is not much help, so your on your own after that, but one of the only things it does translate is saying that is the official stock rom to reload via the SD card. Good luck!
There's probably a lot more info on that thread, but like I said, it's not my language of choice, so not really sure how helpful the rest will be.