For those who have asked, I've had 9 or 10 inquiries about the job via email, including three from designers whose names were unfamiliar to me.
I am waiting for a response from the client as to how he would like me to help: whether he wants a single recommendation, or wants to talk to the 2-3 best candidates. However, due to logistics, I will not help if he wants to turn it into a design competition that costs the candidates money and/or time.
A further complication is that I was traveling with another designer, who said he would pass on the job, but now seems to have some interest in helping . . . obviously, I can't step on his toes since he has already put himself out there by traveling to Africa as I did.
I will be in touch with those who have expressed an interest, as a group email.