If they are poles for a dome style tent try your local camping store. Most of them sell quite a good variety and will probably have something suitable. I needed a couple of "not so ordinary" poles for one of mine, and my store made some adjustments to ones they had in stock and solved the problem for me.
If the'yre the aluminium style poles, have you tried bending them back into shape with a bit of brute force with a hammer or something? Whenever I've had bent poles in the past I've just given them a good bash, and while they're never back to being perfect, they're certainly able to be used.
It's all fun and games until someone gets hurt - then it's bloody hilarious!