welcome to GoY.
my understanding is that it is a 'cool' species but will not tolerate frosts. So not outdoors unless you bring it in to a cool conservatory over winter.

Don't know where to source it but look at the RHS Plant finder or seed specialists.

You might find it in a house plant section in a garden centre.

I'm just impressed that you climbed Mt. Kilimanjaro. That's no small feat. Congratulations! I've been there but didn't venture to climb it. I prefer terra firma.

Hi Mick, you might be interested in Viburnum ‘Kilimanjaro’ - a lovely shrub with pretty creamy white flowers. Mine flowered twice this year 🙂.