The option for different cantilever/stylus is for non-Soundsmith cartridges.
Phono Cartridge Repair / Restoration / Tip Repair | Soundsmith,
For OTHER Phono Cartridges (NOT SOUNDSMITH/B&O phono cartridges):
For SOUNDSMITH phono cartridges ONLY: the Zephyr lll 'rebuild" is $299. Note that this is not a retip, it's a rebuild so the cartridge you get back is every good as new.