This would be really easy to make with a nice block of wood and a piece of Plexiglas! Just use screws with a few washers between the plexi and the wood to allow for the knives to fit in. I want this rustic-looking knife set from West Elm.
This project is not for the average DIYer as it requires access to a CNC machine to cut the pattern in the ply. But if you have a very good hand and an equally good jigsaw you should have no difficulty either. http://diyprojects.ideas2live4.com/2014/09/02/diy-knife-block/ The last option would be a good, old-fashioned fret saw but we’re guessing there are not too many of those in your tool kit :) Would you like to have one in your kitchen?