I don't have any blocks, but I use a zero-cost method for storage of seldom-used knives that mostly live in a drawer with other junk.
On this subject, does anyone have any good recommendations for knife *storage*?
Take a piece of corrugated cardboard, and cut it to fit the shape of the blade, more-or-less. Then, slit it through the corrogations to make a sheath (One piece, don't cut it into two). Keep the knife in it, secured with a rubber band or two. It can then be kept in a drawer without worries. You can also do the same truc with regular cardboard folded, cut, and rubber-banded.
The knives that actually get used around here (cleaver, slicer, and parer) live in the plastic dish drainer.