Where can i find a wooden sign post similar to the image website included?

This is very off topic to a lot of things but i am doing a project for college and need to find a wooden sign post but have no idea where i can find one. i live in central devon and do not know where i can find such things. http://www.imageclick.co.uk/gfx/photos/P51-0017.jpg this is a picture that i am looking for.