I assume you are speaking of the Three Forks rod. I have never tried to find out if the blanks only were available but I have read (perhaps here) on rod building boards that the finished rods is all Cabela's will sell.
Three Forks rods are fantastic for the money. It seems like every spring they put them on sale for $40.
I gave mine to a friend that wanted to try fly fishing..while trying to teach him to cast with the rod I knew I had made a mistake.
Next spring I gotta replace it.