lookin for a calf roping horse

I do breakaway and I have a mare now but she is just not cutting it so I need a calf roping horse.. I don't want to spand over 5,000 and I want the horse to be stout and 15 or younger.. ready to haul. Because I am just learning and me and my horse can't be learning at the same time that's how you pic up bad habits... thanx alot if you know of any or any good sites.....
P.s. I live in texas so I need to find one around that area