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http://www.thingiverse.com/thing:3532123
Extended Phone/Tablet Stand - Flat fold - Print in place! by DavidPhillipOster is licensed under the Creative Commons - Attribution - Non-Commercial license.
http://creativecommons.org/licenses/by-nc/3.0/

# Summary

In gray, in the photo: A longer version of  jonnig's original. I used Tinkercad, imported the STL, repeatedly unioned with rectangular holes to break up the original into pieces, then stuck the pieces back together.

Slic3r said that it fixed the resulting .stl when I sliced it.

Since Tinkercad is web based, the source code is also on the web:

https://www.tinkercad.com/things/gYfrWA22fcY-v2standxlclearance

# Print Settings

Printer Brand: Prusa
Printer: i3 MK3
Supports: No
Resolution: 0.15mm. Standard 0.4mm nozzle
Infill: 20%
Filament_brand: Prusa
Filament_color: Gray
Filament_material: PLA

Notes: 
License agreement is the same as the original - Thank you jonnig, for making this available.