From what I've seen and know:
Camo wise, you could use a Gorka (S, E, etc.), Partizan or maybe KLMK or SUMRAK camo suits.
Anyone more knowledgable please correct me on this lol.
Russian soldiers typically hate the AKS74U and never really use it.. hence its nickname "little bitch". So you if want to go as authentic as possible you should try finding a full-size AK-74.
For gear... I've come across them using the SMERSH and possibly NERPA webbing systems. Hell, you could probably get away with an M22 "Tarzan" Vest.
Word of caution though, russian gear can be pretty pricey.
Theres a GIANT thread on
www.militaryphotos.net with tons of russian pictures.. a lot of great reference photos await you there... last I checked it had about 1000+ pages
Hope this was helpful... you should contact conscript or red dawn here on the forums as well...those guys really know their russian shit :P