cnvi - 7:12 pm on Jul 12, 2011 (gmt 0)
I ran into a similar issue for a client a few years ago. She was selling a very unique product and we could find only one directory to submit her to that was the closest to what she was doing. So we thought, why not create a niche directory for her industry? So we created the niche directory. Made sure only quality sites are added as their requests come in. And then the gravy was that we put her at the top of her categories since she helped us dream up the directory.
The directory is now about 4 years old, its got about 450 links in it and it ranks in the top ten for its primary keywords.
So keep that in mind.. can't find the niche directory? create it!