It is best to contact the individual tribes for specific information regarding the procurement of your goods and services.
Cherokee TERO: http://cherokeetero.com/
Chickasaw Preferred Vendor Program: https://www.chickasaw.net/Services/Preferred-Vendor-Program.aspxation/Locations/Chickasaw-Business-Network/Preferred-Vendor-Program.aspx
Choctaw Preferred Supplier Program: https://www.choctawnation.com/preferred-supplier-program
Fort McDowell Yavapai Nation: http://www.ftmcdowell.org/
Gila River Indian Community: http://www.gilariver.org/index.php/about-tribe/opportunities-group2-opportunities/rfps
Hopi Tribe: http://www.hopi-nsn.gov/Home/tabid/59/Default.aspx
Muscogee (Creek) Nation Contracting & Employment Support Office: http://www.mcn-nsn.gov/services/commerce/contracting-and-employment-support/
Navajo Nation: www.navajobusiness.com
Salt River Maricopa-Pima Indian Community: http://www.srpmic-nsn.gov/economic/
Tohono O’odham Nation www.tonation-nsn.gov
White Mountain Apache: http://www.wmat.nsn.us/
Yavapai-Apache: http://www.yavapai-apache.org/
Wichita Tribal Employment Rights Office: http://www.wichitatribe.com/programs/tribal-employment-rights-office-(tero).aspx