Is there such a thing as…?

[bassbiscuits]

Some sort of adapter ferrule that will enable a smaller machine head to fit into a larger hole in a headstock?

 

I have a set of Fender Japan-sized machine heads - the tuner posts are 12mm diameter but the holes I am putting them into are 14mm (replacing vintage fender sized tuners). 
 

Long story short, it’s been a nightmare trying to find anything that will fit and these are perfect apart from the bushings/ferrules etc not matching up. 
 

Does such a conversion kit exist? I’ve been googling and some exist for guitars it seems but not for basses. I don’t even know what they’d be called to search for them. 
 

Anyone else overcome this same problem?

 

Cheers

 

 

[Lozz196]

When I’ve put Hipshot Ultralites into basses they’ve been slightly small, Hipshots advised to use aluminium HVAC tape to get them to fit and it worked well.

[Sté]

I followed Lobster advice on my Sire U5 with hipshot 1/2 ultra lite and it worked perfectly.