Had to do mine a year or two back. Can be difficult to find a clutch for the diesel at a reasonable price. I got an LUK kit off micksgarage in the UK. I just had a look and they only have a Japanparts kit now:
https://www.micksgarage.com/d/clutch...rts-clutch-kit
Not sure of the quality of Japanparts but it's relatively inexpensive.
If you don't already know the OEM part numbers:
Clutch kit: 5874175
Rear main seal: 5010817AA although you should be able to find a generic RMS and o rings.
Also, just a thought, is your rear main seal leaking badly? If not, I personally wouldn't bother taking of the flywheel and replacing seals. Maybe it's just me but I've had a bit of trouble getting it all sealed up properly and the leak probably wasn't really bad enough to justify the effort I put in. If you do decide to do it, I have the torque specs for doing up the flywheel somewhere.
Good luck!