DIEGO CONTI & MONICA DE MATTEIS - ZAPPA, LUPONE, LUTOSLAWSKI & PÄRT

• Diego Conti & Monica De Matteis: Zappa, Lupone, Lutoslawski, Pärt
      (1994, cd, Italy, cdm)
      (1998, cd, Italy, sulture d’aria)

Diego Conti (violin) and Monica De Matteis (piano) arranged a number of FZ compositions from The Frank Zappa Songbook and recorded them for their “Zappa, Lupone, Lutoslawski,, Pärt” album. 
Released in 1994 !

I only recently learned that this fine album got a re-issue in 1998 on the Sulture d’Aria record label.

From the liner notes:

Frank Zappa (1940 – 1993)

Is the irony of one who has always defined his own work as “pure entertainment”; is the eclecticism, is taking from the past, the present and the future of the music which he loves and which he does not (to play with it).
A great and perhaps a unique linguist, he doesn’t mention the thousand styles which he uses in his own artistic production; his language “is” those thousand styles, and each of these styles is Zappa. His way is many ways.

Here's a recording from 2001: Diego Conti performing Peaches En Regalia, Little Umbrellas and Son of Mr. Green Genes.
Only available on YouTube, as far as I know.