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 dont want to spand over 5,000 and i want the horse to be stout and 15 or younger.. ready to haul. cuz i am just learning and me and my horse cant be learning at the same time thats how u pic up bad habits... thanx alot if u know of any or any good sites.....
p.s. i live in texas so i need to find one around that area