I agree – but Nukeproof/CRC/Hotlines are collectively useless with their headsets.
You can – in theory – get the lower bearing (41.0 x 45 x 45) but CRC are out of stock
They will probably never have it again 🙁
There may be an FSA equivalent , check Windwave (the importers) of UK Bike Store who seem to stock most of them.
For the record I have same headset in my Blue Pig X and the upper bearing has stayed good, the ‘sealing’ on the bottom one is woeful. Unfortunately I can’t remember if they are the same bearing top & bottom. Maybe phone Hotlines (the importers) and seek advice/grovel for assistance/sound off about lame product support (selling mediocre headsets that you can’t buy spares for !).
For me I should have known better as my other bikes have or had Hope headsets !
Good luck.