From Mission Spec:
Mission Spec, LLC has been named the distributor for DKX Armor in the states of Kansas, Missouri, Iowa, Nebraska, Colorado, Oklahoma, and Arkansas. Currently, the M3 (ultra-light weight level 3+, buoyant) and M7 (level 3+ special threat rated) are available at MissionSpec.com in various sizes and cuts. Potential dealers and departments/units should contact Mission Spec directly for volume pricing information by email or phone. Contact information can be found on the Contact page of the Mission Spec website.
M3 product page: http://missionspec.com/
M7 product page: http://missionspec.com/