Obviously no-one here would consider looking at an MSFS TU154...
An M version has just been released as freeware. Put together by a Russian team, it is particularly detailed and to my non-expert eye very well executed. Many systems are simulated, (including cabin pressurisation but not the fog). It offers an insight into the Russian way of doing things and might be worth a look...if anyone was willing to lower themselves.
It comes with an English manual. Cyrillic gets easier after a while I'm told.
http://www.protu-154.com/index_e.html
cheers!