I know this is very old. I just happened to stumble across it searching on google. I believe all those varieties are trade marked and unable to get except for the tomahawk. Tomahawk has finally been deleted as well as zeus. They are actually columbus strains and are no different in their makeup. So sometimes you can find it listed as ctz or just columbus, ctz obviously abbreviated as columbus, tomahawk, zeus. You can find the columbus strain on fresh hops and others locations. If someone finds these trademarked rhizomes on the black market I would like to know about it.
My Thanx!