Rarely does a cigar come around that I haven't heard of but I pulled a blank on Napa Valley Cigars. I know there are new cigar labels coming around...and going bust every year, some years more than others.
I checked Napa Valley Cigars, I got:
Napa Valley Wine & Cigar
www.napavalleywineandcigar.com/
No online sales, nice cigar list but no Napa Cigars by name. Sometimes someone will just get a maker to put their label on boxes.
ALSO the cigar source is Pearlman's Pocket Cyclopedia of Cigars but mine is pretty old.