Of course you can. All they have to do is leave the IR filter out and turn the color processing off. Most image sensors today, at least the CMOS stuff, has full on board image processing but it can be controlled in a lot of ways including having a B&W mode either through a serial control bus or pin programming for the common stuff and usually color or B&W mode is one of them. Here's one. It's an IP or ethernet camera with IR illumination LEDs and it's 3 megapixel High Definition camera so has useable definition. You could add more illumination to extend the range even further. You could probably find someone who will take the filter out and permanently set it to B&W mode.
Here's one that has high dynamic range too. About 115 db I think although it's not in the specs.
Indoor/Outdoor SUPER HD 4MP Network IP Infrared Bullet Camera with Smart Detection (See Up to 100 Foot in COMPLETE DARKNESS),Infrared Bullet Security Cameras, - CCTVSecurityPros.com
High dynamic range simply means it can cover scenes with dark areas and areas in bright sunlight at the same time. It has more dynamic range than your eyes do so you lose nothing. With 4 mega pixels, it's high def too. It uses an Omnivision CMOS image sensor.
Sometimes dynamic range is more important than sensitivity because you can always add illumination for the dark but you can do nothing about scenes that have a higher dynamic range than the sensor can accommodate. I got the company to develop high dynamic range sensors in order to deal with the automotive market and they found it to be a big hit in security market too.