On the basis of the Cassette Tape Holder by 4Volt for SD Cards.
I have changed the layout to allow it to be appear as a camera instead of a cassette so I can keep my SD cards safe in my camera bag.
I added the plan and residing springs as stated in the remarks of 4volt. I have not tried them in wood but they undoubtedly work in acrylic.
I have also
Use 3mm Acrylic and leave the protective plastic on for the 'Flash' and 'Control' on the rear.
White lines are trims. Green lines are Vector Engraves