Hi, nice to meet you. I'm from Argentina too, and went to see Regina in 2010.
Did you know this Facebook page of the Argentine fans? Some of them got to meet her and take some pictures with her last time, "The Reggianitos": https://www.facebook.com/groups/150527661650354/?ref=ts&fref=ts. You can check the pictures section.
Maybe here you can find other people with your plan (just a suggestion).