We used diy-taxis.com. You can book in advance for both your arrival and also departure. We put in the flight number arriving and the man was there to meet us with a large 8 seater mini bus just for 4 of us. When you book you will also be required to put in your departure flight number and they work out the best pick up time for you and they arrived exactly on time with another 8 seater for just the 4 of us. Cannot fault this company would highly recommend them as they were also the cheapest online at just 60 euros return for 4 ppl.