Unfortunately I was unable to find a driver for this instrument at http://ni.com/idnet. This leaves you with one of a couple options. It may be possible to modify an existing driver to work with this instrument. Otherwise,
Instrument Driver Network states a few options to obtaining a driver. Drivers are developed based on demand and popularity so the more requests, the greater the possibility that one will be developed. It would also be beneficial to notify the instrument manufacturer, they often have drivers for multiple programming languages. However, IVI drivers are only written for standalone instruments in the eight IVI classes(DMMs, Scopes, Function Generators, Switches, Power Supplies, Power Meters, RF
Signal Generators, and Spectral analyzers) that communicate via GPIB, Serial, or TCP/IP, so I doubt your instrument will be supported under IVI.