Believe it or not there are now several Via Ferratas on the Costa Blanca.
Ferrata del Cid
A much smaller via ferrata exists at Villena and is called The Castle of Salvatierra.
Itís only a short ferrata, a couple of hours at the most, yet boasts a monkey bridge and overhanging rock. We combined it with a half days walk around the area. - Thanks to Trevor Allen for these details
There is a local guide to the via ferrata that contains a full description of the route as well as approach information with maps and photo topos. It appears to have all the information that you could possible require to climb this route so its well worth checking out.