For particular reason I don't like to look at that flag anymore. So I hacked my keyboard layout, changed its name, flag and added missing Ukrainian-Cyrillic letters to it.
.. image:: screen.png
UPD: Added a version of standard "Cyrillic phonetic" keybord layout with a better flag.
What would you need R***ian letters on your keyboard anyway? Just use Ukrainian keyboard and set yourself free.
.. code-block::
cd /tmp && git clone https://github.com/muromec/bandera-layout.git
cp -r bandera-layout/Cyrillic\ bilingual.bundle ~/Library/Keyboard\ Layouts/
Don't