Select and Buy beacons for Indoor Tracking

Hi everyone. I would like to develop an application to monitor the movements of the operators in an “indoor” area. I thought of using Location Beacon to cover the work area and give the operators a bluetooth “TAG” to interact with the beacon.

I was wondering if, in this scenario, it is better to use location beacon or UWB beacon. I need a good level of accuracy, less than 50 cm error.

I am also struggling to find an Estimote beacon dealer and the Estimote salesmen do not relate to me. Ideas?