I couldn't find a layout for this aircraft so I made one (or two) :)
There is two layouts included, 2-class / 87 seats (used Aeroflot as reference), and 1-class / 98 seats (Brussels Airlines). Both are the SSJ100-95 variant.
To install, just drag and drop the SU95.xml and SU95B.xml files into the Assets/Airplanes folder in the PACX installation folder. The B-version is the 1-class layout.
If you don't have the aircraft yet, you can find it here: https://flightsim.to/file/15864/sukhoi-superjet-100
And if you need more liveries for the Sukhoi, I made a few, such as Brussels Airlines
Let me know if you like it, or if there is something that could be improved! :)