Best source for radio edited rock, metal, punk, etc. songs

Hi, I’m a radio presenter of my own rock show (for a charity run volunteer hospital radio station) and I have a heap of tracks I’m looking out for radio edits of so I can safely play them on my show.
My question is do you guys or girls have any good shouts as to places I’d easily get radio edits of rock, metal, punk songs?
Answer #1
have you tried streaming companies like Pandora?
Personally, I love Pandora. I subscribe to Pandora One
http://www.pandora.com/