Hi,
The Library of the University of Reggio Emilia keeps a digital archive of the OMI-Reggiane. You can find here a list of the available technical docs and pictures in Excel format (under "Sezione Aeronautica", i.e. aeronautical section), and the emails of the gentlemen to contact:
http://www.biblioreggio.unimore.it/o...-Reggiane.html
In the Excel file, you may want to sort for "Strumenti" (Instruments) under the column "Soggetto" (Subject).
Hope that helps,
Regards,
Insuber