A simple case I did for my DSO0138.
This one is closed up with screws, so you can easly access the DSO0138 again in case you need to change the batterie.
In case you don't like screws, there's a "glue-together"-version of the case here (without batterie): https://www.thingiverse.com/thing:3448128
print the "stick" three times and force it onto the original ones to extend them.
The nuts will be embedded in the print!
Pause your printer at the correct layer and put them in place, while printing "top_bat.stl"
1x On/Off Switch http://tinyurl.com/y2t2g3qj
6x M3 Nut
6x M3x10 Screw