I used gov't charts for my IR and I did not see any MVA on those charts. Whether or not they are depicted in Jepp charts or foreign plates/charts I don't know. All I know is that only controllers use MVA in case of an urgency/emergency. If not the lowest you can go on a published airway is the MEA, MOCA, MRA etc. According to this article the MVA is usually lower than the MOCA so for a pilot to use MVA I am assuming they would have to be in a really tight spot (in a radar environment of course).
AOPA Online: Instrument Insights Part 3 of 12: Advance Planning