I need help, please, anyone?!?

Okay, so my dog plays frisbee, like I will throw it and he catches it. Well, we use to buy frisbees at Old Navy, but they don't carry them anymore. And these frisbees were the only ones that held up, because he would chew on them and other stuff. We tried the tire ones at Petco and they didn't work, it was destroyed in 5 minutes. He needs the rubber ones. Is there anyway we could buy the frisbees from Old navy online? Or is there any other site you might know of? And they can't be expansive! The Old Navy ones were $2.50...please help!