A lot of Ugandan coffee is grown on the slopes of Mount Elgon.
If you look at a map, you will see that Mount Elgon is huge and spans the border between Uganda and Kenya.
Kenya coffee from Mount Elgon is much more expensive. Is it that much better?
I have been buying Ugandan Mount Elgon coffee for years.
My experience is that it is a good price for the quality.
Don't take my word for it, buy samples of Kenyan & Ugandan Mount Elgon coffees and taste for yourself.
If you are a home roaster, I agree that Happy Mug Coffee is a good supplier (no, I'm not in any way affiliated with them).