Werrd 4xl axle size

Where can I buy a axle for my werrd 4xl it fell down a storm drain wile I was changing my string and for bumpd

Go to the hardware store and look for a 4mm x.7mm pitch set screw. Probably 16 mm long. See if it all fits. It should. If they don’t have a set screw buy a regular screw and cut the head off. File the cut smooth.

Ok thanks