I think you'll like some of the stuff here. Various sound packages of radio chatter, pre flight check lists etc in Wav format.
http://www.shuttlesim.be/download.html
If you have a mic and presumably some mixing software, couldn't you make some yourself with some phaser, amp/speaker model sim and crystaliser plugins, that way there'd be no worry about royalties, well if its 'spaceman' style stuff you're after?