Ah, dont worry about the sounds themselves, I have this site http://www.tf2sounds.com/#s=2 in which there are (I think) all of TF2 quotes. As for spy's sound, I noticed they lacked some quality, too. Maybe I should check your link and see if I can get it better.
Aaah, finally some feedback ! Thanks ! I'm planning on doing Scout and Engineer soundbanks. As for Demoman, Pyro and Soldier, I'll make them if I have some time, but I think they're less interesting. Besides, how will I make a Pyro soundbank ? (actually I'm sure it's possible. I'll see.)