As a half-way point, Joerg Zeitschel, whose been doing a lot of super cool repaints (mostly ficitonal FS9 repaints for POSKY, Kittyhawk, IFDG etc) painted the IFDG A319-100 in colors exactly like the Sukhoi Super Jet 100, since there isn't one for FS yet. Go to avsim.com, search in the file library for "sukhoi ifdg", and it should bring you right to the file.
If there was one in the works, I would think that maybe Samdim would do it. He (they??) have already done the AN-148, so here is to hoping that there is a Superjet in the works (along with an E190/E195 )
An American expat from the ORD area living and working in SYD