I had multiple issues with Karoo Taxidermy including painted skulls, rotting flesh, bugs, and cattle teeth cobbled on with big gobs of epoxy. I have laid out their shoddy work (with photos) in another thread. They sent the crate off to Rex Forwarders without an estimate from them or even telling me. Once Rex had the stuff I was stuck paying them whatever they wanted or else. The air freight from Turkish Airlines was $900. Rex charged me more than $2,000 apparently just to haul it to the airline. Then they didn't send me the paperwork to provide to broker here. We had no idea the crate was on its way. So it sat in the warehouse in Toronto till we could track it down = $$$!. Jerks to deal with.
I STRONGLY suggest that you shop for African freight company rather than turn it over to taxidermist. There are quite a few available that handle trophy shipments. They will catch on quickly that you're shopping and the good ones will try hard to get your business with a sensible bid. Once the taxidermist has the stuff crated he can give you dimensions and weight so you can look for bids.
Also, unless dealing with a broker on this side who has its own bonded warehouse, try to ensure the shipment leaves Africa early in the week. If it arrives late in the week, even Thursday, the air freight company will find ways to delay it in their warehouse over the weekend. Expect that it may be a day or two waiting for customs inspection anyway. The bloody warehouse fees are terrible. Also, if you can pick the stuff up yourself at the airport that can significantly speed up inspection. Personal effects goes through a different customs queue than commercial. If a broker handles it, it's commercial goods.
I use Hunters & Collectors Taxidermy in Port Elizabeth. They do very good work but it takes a while. He's never charged extra for sticking the skulls on scraps of plywood cut in shape of plaque. That way it goes through inspection as finished taxidermy. Also the wood "plaques" can be attached to side of crate so skulls aren't rolling around. And client can see how the skulls are properly attached to plaques if he wants to make his own.