A cure is going to be a lot more difficult than a vaccine. The reason why some victims survive without any special medical treatment is their bodies start to produce the antibodies. In other words they survive just long enough for their immune system to kick in. Most victims do not survive long enough. Medical treatments such as IV antivirals might change that dynamic, but not substantially. Given a vaccine, a primate would create the antibodies beforehand and the effect would last for years.
At the very least we should vaccinate all the gorillas before they are wiped out and that would also be a good test of efficacy. Human safety testing is already underway but since we will never deliberately infect a human, it won't test the ultimate efficacy.