I'll arrive in Arusha on a Sunday around noon, to start a Kilimanjaro trek the day after. While I have most of the required/recommended gear, I need to get a few extra things. I have the option to rent from the trekking company, but I've also considered buying some of it as I might have use of it later. I haven't found good outdoor equipment stores in the country where I'm currently living, otherwise I'd have bought it already.
So, my question is twofold: are there stores for outdoor equipment in Arusha? If so, are they open on a Sunday afternoon?