You will want all the AIPs, ERSA, DAPs and ERCs but can get by with a subset of the others - you can download the appropriate CAO/CAR/CASR/CAAP sections you need and must bind them in a folder so long as they are just the documents (ie no indexes or pages you add). I think Bob Tait may provide a copy of those pages to students using his material (his books or trial exams - try his web site forum and ask there) but you should be able to hunt them down yourself on the net - make sure they are the official docs though and must be in a folder not just loose pieces of paper.
Alternatively learn the material in those docs really well and rely on your memory but you would be foolish to not have the AIPs, ERSA, TACs and DAPs in the exam (and know your way around them).
You can also talk to your school and see if they will loan you docs for the exam.
You will need the AIPs, DAPs and ERCs anyway (or Jepps equiv) for your training and use later so that is going to be a given cost anyway.