http://www.freeenglishnow.com/ This is the address where you can download free specking materials. You will find both british and american accent here. There is a pdf book in it and a speaker sign in the book . When you will click on the sign it will play any of the accent you will select. It will teach you like a teacher . I think it will be a great collection for them who will prepare themselves for IELTS. If you will find it helpfull then plz continue the topic as other people find it on the first page. Good luck.