The costumes for the church members are made at the same place The Vatican uses for their clothing.
In the history of the Church there has been only one meeting between the Pope and the Patriarch of Moscow and it took place in 2016 in Cuba. The relations between the Holy Roman Church and the Russian Orthodox Church are historically tense and that's why Cuba as neutral ground was chosen for this meeting. There has never been a meeting between the pope and the patriarch in Rome, such a meeting doesn't seem very likely at the moment, but should it ever happen it would be an enormous event covered by media from all over the world (not like depicted here).