A simple lasercut cashbox I've designed for the lasercutter fees at metalab, vienna (http://metalab.at).Cut it out of 4mm wood (e.g. using a Lasercutter) and glue the pieces together. (You might want to adjust the size of the two circles to fit your lock first.)The dxf file has been created using qcad. The *.scad files are an OpenSCAD (http://openscad.org) 3D model of the design (for verification of the designs integrity).