Here are some links to where you can buy your own Ventriloquist Dummies.
Puppet Store USA
http://www.puppetstoreusa.com/default.asp
Puppets and Props
http://www.puppetsandprops.com/img/topbut.gif
Kem Poyner Creations
http://ventriloquistdummy.com/
Ventriloquist Marketplace
I will Post More As I Find Them.