There are a number of such websites and a Russian TERB. One of the Moscow websites
http://red-club.com has over 1,500 girls of all descriptions and prices ranging from US$35 to US$150. The girls at the top price end are often pro models.
Service there seems to be different from Russian type service here and "everything safe" is the standard with MSOG. However, selection, price and looks are all somewhat better than in TO.
As regards tours, I'm not sure that's feasible. Unlike SE Asia, there are no areas devoted to sex per se. The Moscow girls are spread all over the city in apartments. So you can't really "tour" them.
Interestingly, Russian guys seem to spend as much time reviewing the plumbing in the girls' apartments as they do the sex. I guess it's all a matter of priorities.