The Dispatch | Expert | Scudo Hub

Hello! I have just brought home a lovely red Dispatch. It's a 2006, 1 previous owner, 80K miles, FSH... great condition, BUT! It's not without faults. So I was wondering if any advice could be given on the following:
- There's a clunk / knock coming from the rear passenger side when driving over bumps.
- The radio code is missing and needs to be put in in order to work.
- The bottom part of the rear doors isn't catching.
- The fuel gauge didn't move after I put fuel in.
Any help or advice would be gratefully appreciated. Also if anyone knows of a good place for parts, I'm looking for a couple of bits of trim.
Cheers!