I need a new freehub body for the above hub, will any shimano one fit or do i need a m475 specific one?

normally a specific body although they do sometimes build in crossover compabability.

best to search out the correct one

There are few from other shimano hubs that can be made to fit
M525 for one.
But saves a lot of hassle if you find the same one

http://bike.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50rparsys-0033-downloadFile.html/06)%20Freehub%20Interchangeability.pdf

I’ve looked at that interchangeability chart a few times now, and I still haven’t a clue what it’s telling me! 🙂

Buy a complete M475 hub from whichever of the German sites is cheapest and use the freehub off that. It’ll almost certainly be cheaper than buying a separate freehub.