What ibanez iceman guitars are baritone?
Factory made- none of them (to my knowledge). Daron Malakian of
System of a Down had a custom Ibanez Iceman IC300; perhaps you can
find that signature model somewhere. But it'll cost you a pretty
penny.
You can customize any Iceman for cheap, however. If you're
wanting one real bad you can search for an Ibanez Baritone neck and
Iceman body and just hook them up when you get them. Or build one
from scratch, if you're up for it!