has anyone ever heard Alejandro Vi

Yes,
I have a recording of it with Robert Van Sice as soloist. You can get a copy of the CD if you contact Mr. Vinao: http://www.vinao.com. He has a CD with recordings of all three of his works for marimba, including: "Tumbler" (Marimbolin), "Marimba Concerto" (Robert Van Sice -soloist), and "Khan Variations" (Svetoslav Stoyanov). You can also order the scores from him too. There are also program notes on the pieces on his site if interested.
I really like the Marimba Concerto, and Vinao is one of my person favorite composers that I recently have discovered.
~Behzad