Lost the original NAND and DVD key

From one problem to the next. I managed to successfully RGH Corona 4Gb but with a bit of a caviat. I used the donor NAND to flash it and it seems that for some reason I've lost the original NAND backup (if I ever had one). The problems emerge with DVD drive the DVD keys don't match.

Long story short is there a way to read the "original" NAND from somewhere or find the DVD key to get that one sorted out?