Hey there!
I have a 'small' problem with a broken Wii I own: I have the (supposed) keys.bin from bootmii, but not a full NAND backup.
On the other hand, I've got two older (4.2E Boot2v2, 4.3E Boot2v2) and two fresh (4.2E Boot2v4, 4.3E Boot2v4) NAND backups of my other Wiis which are working...