You are right some Foundry civilians are suited for your purpose.
On the other hand "strategia e tattica" of Italy has in his colonial range a set of a Ras with reinue.
It includes a coptic priest an umbrella bearer and maybe another couple of types that also might be useful.
They are 25mm and might be a little short.
Unfortunately for some reason, today, I cannot open the link and so I cannot show it.
Anyhow, NorthStar stocks some of his ranges, but alas not the colonials.
On second thoughts some of the Perry's Sudan civilian types might be pressed in service. Also some of Askari's civilian types might also. I think that Askari's Ethiopian spearmen and safari servants, are in direct use.
http://www.askari-minis.com/webstore/index.php?cPath=52In general the Ethiopians being christians wear no fez and women have their faces free. Perry and Askari miniatures civilians might need head swaps with ethiopian ones. But these do no not exist.