Looking for crowd sounds

[Caedrus]

I'm looking for a good variety of crowd sounds for a gladiatorial arena, including crowd cheering, roaring, chanting, disapproving, etc. I need an actual variety, not just a single ambient track, because the crowd is supposed to be a dynamic element.

I figure something like the crowd sound effects used in these videos:
http://www.youtube.com/watch?v=SV6x1ZEcLDU
http://www.youtube.com/watch?v=QkymY-gDWho
http://www.youtube.com/watch?v=IZqmXDlCd6k
http://www.youtube.com/watch?v=GvDfsjIuf34
http://www.youtube.com/watch?v=f8_vIWCx9C8

But I have no idea where to find such sound effects. Can anyone help?

Many thanks in advance!

 

[kile_so]

Here, i hope this will do.

 

[rober artua]

tons of free sounds

http://www.freesound.org/

 

[Gekigengar]

http://www.pacdv.com/sounds/people_sounds.html