As you do the work to learn about them and the stuff to get your licensing (you need ot check with animal control, fish and game and USDA) you will learn about sources for them as well. Here are some resources to start you off.
www.junglefriends.org www.simiansociety.org www.petmonkeyinfo.org www.monkeyzone.com
www.junglefriends.org www.simiansociety.org www.petmonkeyinfo.org www.monkeyzone.com