You can try here. Dunno.
FreeCovers.net - Wii Covers
I am looking for the disk images SP9P4Q.png and SISCS1.png. I couls not find them on wiitdb.com or wiiboxart.com.
Anyone have them or know where to find them?
And depending on which loader you use you can download them in your loader. I just used wiiflow to get some covers actually.