Martin,
Have got one of these which works well:
http://www.racing-cars.com/pp/Manufa.../ED199401.html
And ones of these, which is equally good though a little restricted when it comes to longer screwdrivers:
http://demonpowerproducts.co.uk/prod...edition-p-3791
Or if you need more space for items other than just tools you can't go far wrong with either the Polyno or Polybutler Pit Boxes:
http://www.racing-cars.com/pp/Manufa..._RC/CR148.html