I use Minute Rice. The white rice works best, but the brown rice is okay if you let it sit longer.

Whole Foods in St. Louis has the Fantastic Foods brand refried beans. They used to have the black beans as well, and so did at least two other local grocery stores, but then they disappeared completely for a while. The refried beans finally returned just recently to a couple places. You can order them from Fantastic Foods, but it's not very cost-effective when you add shipping unless you order a huge amount. I've also tried Ready Beans, which I liked, but they have the same issue with shipping.