There are still stands for hire at the exhibition which runs every day until 6th September.
Here is the link for the web page:

http://www.bournemouth.co.uk/site/things-to-do/culture/the-pine-walk-art-exhibition

and this is the link for the application form:

http://www.bournemouth.co.uk/dbimgs/Pine%20Walk%20Application%20Form.pdf

or phone no 01202 451719