If you like to download freely some important MANUSCRIPTS like the ones of BOTTESINI,
DITTERSDORF, BOTTESINI and so on, you might download them from the website of Italian Maestro PAOLO
This is the direct LINK:
http://www.paolobenelli.com/manoscritti/ . High recommended !!
I also remember you the CD by PAOLO BENELLI about "SOLOS" by Domenico DRAGONETTI and his sheet book by CARISH.