There are a number of companies selling NIR instrumentation. These are a few worth considering.
CDI Pharma
Control Development provides low cost diode array benchtop instruments as well as a wireless, explosion-proof instrument for following pharmaceutical processes in the process stream.

FOSS
FOSS, a pioneer NIR company with over 30 years of experience, supplies benchtop and process instruments. Based on rapid grating technology, they offer many software features absent in other packages and are now fully compatible with "Unscrambler" and their software works with Microsoft Vista.
