Don't take this for gospel mate but from memory the USA and Euro Spectors use Schaller tuners. They will either have a 1/2 inch or 3/8 inch (17mm or 14mm) hole and Hipshot produce Ultralite tuners in both sizes. You may just have to remove one of the current tuners and measure the hole.
If it's one of the Korean models then I'm pretty sure they use Gotoh style tuners which use the 14mm holes, again covered by Hipshot.
As always please check and don't take my word as gospel but Iim pretty sure I am right!
Fender Frank Bello/Dimarzio/Warmoth P/J. Warwick Quad VI.
Ashdown ABM 410 cabs. Metal Bassist #65. B & M #452.