Second gear

[HDi--Power]

New hub is around £175.00 plus labour to install, while it's apart you may as well do the input shaft bearings and seals £50.00 and £100.00 to fit

I'll mention this to my mechanic, thanks for the advice. The labour wouldn't cost me anywhere near as much as you said though as he does the work on my car at his house.

Where could I get these parts?

I highly doubt your mechanic will be interested in opening the gearbox himself either