This bracket is designed to work with the double tact
mod in wii / gamecube portables. The measurements are:

squishy tact: 7.25 x 7.25 x 3mm 
hard tact: 6 x 6 x 3.5mm 

*These dimensions are only the plastic square they sit
on, not including the protruding button.

This package includes two sketchup files for the
bracket. One of them is just the regular bracket that
can be edited to fit your needs. The second one is the
same bracket, but with one flat side for easy mounting.

You will probably need to cut small parts off it after
printing, as it usually prints with tiny "branches" in
my experience.