I saw this question asked in the telegraph weekend section a year or so back. There reporter said that they couldnt find any, although someone like Jordans who add it to their cereal would sell it in big 5kg catering packs. Not sure if this is still the case, but thought i'd let you know anyway!
I got some yummy dried whole strawberries from one of those continental markets that come round the UK. They were, brown, very expensive and looked like little dried tongues, but tasted delicious like jam.
Otherwise try a wholefood shop, they may be able to order some.