We have had our rejas done by Ironworks - a guy called Tony. He is very reasonably priced and his work is excellent. His number is 678 691 393 or ironworksspain@yahoo.co.uk, or he is available anytime on his mobile. We have had front, kitchen and bedroom windows at the front done, and also grills between the terraces with a few spikes.
If anyone does contact him, can you please mention that Tammy recommended him.
Good luck!