NI does not do contract work. You can make a request at http://sine.ni.com/apps/we/niid_web_display.request_driver. NI creates drivers based on demand and there is no guarantee that they will develop one. There is information at http://www.ni.com/devzone/idnet/default.htm on how to create your own driver. It's not any more difficult than writing any other type of LabVIEW program. You might also try the Instrument I/O Assistant. If you are in a time crunch and need outside help, there is a whole network of Alliance companies that doe this sort of stuff for a living. You can get information at http://www.ni.com/alliance/. There are members that specialize in driver development or you may want to find someone local to you. Prices will vary.
Well, the link I posted includes the latest guidelines and certification process. With LabVIEW 8, you even get a wizard that gets you started. Following the guidelines, submitting the driver, and getting it certified is the same process that developers at NI use.