Take a look at this place, we bought a set from them in the summer and delivery was quick. Easy to assemble and because we intended to bring the furniture in when we were not there we wanted it to be modular. The quality seems OK but I have nothing to compare it to, although Ive spoken to others on site and even the expensive stuff has only lasted a couple of hot summers.
http://www.tectake.de/heimwerken-garten/gartenmobel/rattanmobel
Also, I think the site above says it does not deliver to Spain but contact them and they will give you another site where you can order it from. The Euro price is much better than what they charge in pounds, insist on paying the euro price, they will honor that. Good luck!