I need to find out where to get extra deep cake boxes. The deepest box i can find is 6 inches but i would like at least 8 inch deep.
BRP Boxshop sells a 12 x 12 x 10" (10" is depth) cake box (online website). I have bought from them before, and have been happy with their quality. You might also try interlocking 2 deep bases to gain extra height. Hope this helps!