Actually, Klonopin (clonazepam) CAN be prescribed as a regular anxiety medication. I have known several people who have had success in taking it regularly, but there is (as with SSRIs) the problem of building tolerance. Have you also tried complimenting your medications with meditation, therapy, or massage?
As a benzo, there is also some potential for addiction, but that potential is not nearly as high as it is with Xanax (alprazolam) or Ativan (lorazepam).
If your doctor is willing to prescribe you Klonopin, I think it would be worth a shot. It is an anxiolytic, and should be more capable of treating your anxiety where SSRIs have failed.
Best of luck.