Bellatrixa! Hope you found out by now. If not, I did come to Addis Ababa with the expectation not to find hardly any baby gear. I was wrong! There are a lot of stores and the challenge is to find the good ones. Many stores only keep one of every item and its often dirty... I found everything from baby car seat, stroller to changing table at Dembel (shopping mall) and at a nice store at Laphto (where there also is a big gym). We pay about the same or a little less for diapers than we do at home so don't bring them like I did at first
I still have people bring me formula from Sweden but they have a lot of it here too. I just don't recognize the brands so I feel more comfortable with what I know.
Maybe you are already here in Addis! If you would like some more tips just let me know
Best wishes/Anla