My thoughts:

- Ask a landy mechanic to create you a list (Foley's have done this for others) as they know the likely bits.
- Parts are very expensive in Africa, but labour cheap. I travel with a huge box of spares.
- DHL is not 'everywhere' as you may hear. It will get to most capitals, but not areas like Western Sahara for example, or you could be 500 miles from the capital with little public transport. Who is going to travel to the capital and wait for it to clear customs etc? Who will stay with the vehicle whilst you do it etc? So take all sensible spares and don't believe that you can get what you need as you go - at least for small light weight and cheap items like seals, rubber hoses etc.
- Some places will do a sale and return for about a 15% restocking fee - but you need to keep it in good condition.

Then start with your tyres and work through all of the bits that would stop you driving 500 miles to a garage in the capital?
Tyres needs patches and a kit to put them on, spares tyres and gear to change them, then onto the axle ends (seals, oil etc), axle inside (oil, seals etc), what if somebody steals the axle plug? How much is a spare?

Then you have some things that join the two axles together - what could go wrong on them - prop shafts and joins.

Steering is important - joints and bushes are cheap and will wear out. Do you have a way of straightening the steering bars if they get bent?

And so on ;-) Others will have lists!

But remember it's often about having the right tool or thing to bodge a fix as well - there are lots of cool liquids things in tubes to patch up metal, leaking radiators and so on.

Gotta go, cricket on tv now ;-)

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Kiwi, 7 years around Africa. Overlanding channel:https://www.youtube.com/c/roamingyak