If you wanted Charolais - there are a bunch of directions to go.
If you want black - there are three main alternate bloodlines for steers:
Full Flush Lines - not used as much any more, but Friction is an example
Who Made Who lines - Who himself and Hannibal are good examples
Habanero Bloodlines - Several lesser known, but good choices such as Shamrock.
Other possibilities for black bulls include Torque, a new bull called Escalade (Strictly Business x Habanero) that I'm giving a big try this fall.