It depends where you are. I see that you are in the Okanagan.

I tried to phone Olaf African Store in Kelowna, and there was no answer, but perhaps they were busy.

Olaf African Store
Address: 735 Cook Rd #109A, Kelowna, BC V1W 4T4
Hours: Open ? Closes 7 p.m.

In New Westminster where there are several communities of immigrants frmo Africa there are several stores that might help. There, I phoned Machi African Store

Machi African Store
445 12th St #443,
New Westminster, BC V3M 4H7
Open ? Closes 7 p.m. · (604) 553-4593
Phone: (250) 215-1990

Wherever you happen to be, I would google “African Grocery Stores” and see what turns up. There are at least 10 stores in the Lower Mainland.

If you cannot find it near you, I recommend that you look for a store that sells Masa Harina, a white fine corn meal very similar to Sadza and Ugali.

You might also try Cream of Wheat, which is a similar product made from wheat grains.

Masa Harina