There is no Factory retip. From the ART7 manual:
"When the stylus is to be replaced, replace the entire cartridge. Take the used cartridge to your dealer: This cartridge and other MC cartridges sold by AT are available at the stylus replacement price. If this cartridge is no longer being produced, one of the MC cartridges currently being produced will be available at the stylus replacement price."
Which is still confusing, as there is no stylus replacement available at any price.