Or...you could rebuild the axle quite easily.
Dismantle the hub/axle from the CV joint and driveshaft.
Cut off any remaining threads from the original axle, so it is flush with the flat end of the axle.
Drill out to 2.5mm a hole where the thread used to be, all the way through the axle.
Tap out to M3 using a M3 tap and wrench.
Insert an extended grub screw into the tapped hole (about 8-10mm should do), and replace the small M2.5 nuts and washers with some nice beefy M3 nuts and washers off 10th.
No more problems!
