We asked around until someone showed us a man at Squares who sells pork meat, but he sells it cooked. He said to come in the morning when he kills it to get uncooked meat. The next day we showed up, and he called an achaba (motorcycle taxi) who took us to a neighborhood a kilometer away, where we greeted a grandmother and grandchildren, then were led around various houses and cook sheds into a relatively nice home, with a nice sitting room with a television and motorcycle inside. Then, we sat for three minutes, until a man came and negotiated a price with us, and we zig-zagged back through the compound to the street, and walked to his store where he has a fridge full of dead pig parts. He kills one hog every morning. We bought 2.5 kilograms of pork meat, asked him if he would provide fat for us (to render into lard) and after exchanging numbers, we got back on the achaba to take us back to Squares, and he charged us too much because we didn't agree to a price before we left (notes for next time: don't do that).
So, it's a little more difficult than just picking up a tenderloin in the fridge section of the supermarket, but it's pretty much as local as one can get!
Now, to make some barbecue sauce...