I have a BUPA medical in Saudi Arabia and shall soon be moving to Nairobi. Is the same BUPA card acceptable there? Is there any Insurance Cover Provider affiliated with BUPA?
You might find this Expat Arrivals page on health insurance in Kenya to be useful.
What cover does BUPA currently provide you? They do provide cover plans for international health care, so going through an affiliate won't be necessary.
You might just need to change your insurance plan to include international cover.