The great thing about Unit 3 Section B, unlike Unit 4, is that you don't have to reference where you found it. Wikedia is great in this situation and gives a lot of information like the estimated costs and how long they think it will take - stuff that is only scarcely introduced in the resource. It also gives you a breakdown of the costs of each part of the project and a 'recent developments' section.
As Wikipedia is source based itself you may be able to find other references that will help you! I'll remain on the lookout for all of us!