I just double-checked and for sure there isn't a specific "K Dry" hi-hat that Zildjian makes. The closest would be maybe K Custom Special Dry hats, which you can hear at this link:
http://www.youtube.com/watch?v=lGhLHpIjJdMThey have a good sound--I know Dom Howard from Muse uses these hats so I guess they can be alright in a rock setting, but the 13" size might lack the punch you need if you're playing rock or similar loud styles (especially unmic'd or whatever).
Either way, I can tell you right now whatever that guy has will be wayyyyyyyyyyyy darker than Z Custom hats would be. Z Customs(now Z3s if you are buying new) are Zildjian's brightest cymbals that are designed maximum cut/projection in heavy and loud music, while K's are the darkest and are geared for having complex tone qualities. K Customs have a bit more cut and are drier overall but are still dark.