Hello Tim,
What an adventure you have in store for you.
Vehicles into Ethiopia are quite an issue.
They come in two ways, duty-free, if brought in under and NGO, or duty-paid, for personal use.
I may be interested in the vehicle, and can explain more through email communication, rather than on this blog site.
Would it be possible for your to text me your emil address, please?
Or if you are comfortable posting it here, that would be your choice.
My mobile is +251-940-295-285
Hope to hear from you