Digital BW, The Print

A few of my images prepared as digital files have been accepted at a 
stock photo agency. The catch is that they do not want digital files 
OR my carbon pigment b&w prints (with my existing agency I can simply 
send them images on cd). They want traditional b&w silver prints. So 
now I need to figure out the best way to make B&W negs from the 
files - and then I can have regular prints made.

Anyone have experience to share ?
thanks,
Frank
www.frankgross.com