At the moment I am thinking of the AP one, due to a bulk buy they are nearly as cheap as the B&B
I have not looked to see if the clutch shaft is hardened, if not I might try drilling a 2mm hole up the shaft and then cross drilling for the grease to exit. A M6 grease nipple on the end and you are done. If it’s hardened then I will look at Mike Satur’s ready made solution.