Finding past papers for A2 Biology Edexcel

Currently, I am doing my A-levels and one of them is biology, the course being Edexcel A2 Biology and I want to start my biology revision now using the old past papers. However, I don't want to use my current course past papers, as I would like to save them for nearer the time, so using this link I have found some of my courses old old papers [Removed], however they don't have much correlation to do with unit 5, on the wild side and the unite I am currently learning, which is infection, immunity and forensics. Does anybody have any ideas of past paper I could use or have I found the completely wrong past paper?
Thanks

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Have you checked it out on this website: http://papers.xtremepapers.com/Edexcel/Advanced Level/Biology/ ?