Tony’s a tinkerer, his guitars that he actually uses are so specific, and I’m not surprised that for these Gibson left the zero fret away (and a bunch of other stuff). They just look like a really nice SG Special, wax potted P90s, hand wired, orange drop caps etc.
https://www.jaydeecustomguitars.co.uk/tony_iommi_custom_sg.html
Have you seen the JayDee Iommi custom?