Large garden shed??

[kiwifraser]

Our local pre-school (where junior SAS member Rory goes) is looking for a large garden shed, probably plastic, for use to store childrens outdoor toys and equipment.

They run as a charity and the parents and staff raise all of the money they have, so don't obviously want to be shelling out a huge amount of money on a storage unit.

Any suggestions would be very much appreciated for somewhere to get a suitable second hand one?

Cheers
Fraser