Special Teas has an OP Kenyan that tastes a lot like a typical English Breakfast tea. I think it's very good...
Whatever you do, don't order from this company:
I made the mistake. I never received my order, emails went unanswered and the phone call did too. I found out afterwards (on another forum) that other people never received anything either and they had a lot of complaints from the Better Business people. They also change their name quite frequently, but the webpage still looks like this. In fact, when I got screwed over, the company was called Honeybush something or other. A Google search for African Tea always brings up this webpage, though.
You mentioned Upton's. They have 3 or 4 different ones. 2 or 3 are under their "specials" page, along with the few they have under the African page.