I would just go buy some pipe at Menards or home depot.It is pretty common stuff. The ends of your poles should just pull out. If you bent the curved poles just bring your new pipe to a metal shop with your old ones.
People who fish for food, and sport be damned, are called pot-fishermen. The more expert ones are called crack pot-fishermen. All other fishermen are called crackpot fishermen. This is confusing. ~ Ed Zern, 1947