Pagani et al analyzed Ethiopian genetics in their paper "Ethiopian Genetic Diversity Reveals Linguistic Stratification and Complex Influences on the Ethiopian Gene Pool". Their dataset consisting of Ethiopians and a few other East African populations is available online.
The group (weighted mean) results are also shown in the usual interactive bar chart below. You can click on the component labels to sort by that ancestral component.
Because the East African component as computed in HarappaWorld is maximum among the Maasai and several of the Pagani dataset populations have a higher percentage of that component, we should be a bit careful with interpreting the HarappaWorld results for the Pagani groups. I'll likely include them in my next iteration of the admixture calculator.