Hair Dryer Diffuser

I have curly hair that is really cute, but kinky. Many styles, I have been charged with a hair dryer and a diffuser attached, I know what it is, but where can I get one. Im a girl sale rack, so anything over $ 50 is too much. I want something I could get at Wal-Mart or Target. Please help! And "Thanks!" in advance!

You can get anywhere. Ulta. Or nothing. Most come with all the hot air dryers.

Hope this helps