I think that we don't know yet.
His statement could mean many things.
1. He already has a few VL and some of the Espadas already are.
2. He already has a few VL but none of them are in the current Espadas.
3. He needs to find VL.
I don't think that there has been definite proof for either theory yet.
Right know it all comes down to personal beliefs.
I for one, can wait for evidence. Like someone of the current Espadas actually saying "I am a VL"
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"