The livestock industry has developed an embryo implant technology that is also used to help save endangered species. Although complex in practice it's simple in principle; egg and sperm combine in a test tube or original mother then the embryo is removed and implanted in an unrelated surrogate mother. Embryos are frozen, shipped, and implanted in native cows to create herds of pure bred cattle in remote locations without the expense of shipping live cows.
On one "Ripley's Believe it or Not" television show a brown mare gave birth to a full blooded zebra which subsequently thrived. This suggests a way to increase the populations of endangered higher primates.
Chimpanzees, gorillas, orangutans, and the extremely interesting but endangered bonobo are closely related to humans. A corporation could advertise for surrogate mothers for implantation of higher primate embryos. Nine months later the company could purchase the offspring for several thousand dollars and still make a profit. Her only obligations would be to maintain her health, deliver the new born primates, and sign them over. All but the gorilla are smaller than humans and even the gorillas have smaller heads so the stress on the surrogate's body should be less than for delivery of a human baby. Multiple births may be practical for the smaller primates.
Not only is there a critical need for higher primates in medical research but they have unsurpassed value as zoo and show animals. Our closest relatives are charming and intelligent creatures but so rare that few of us get a chance to interact with them. This procedure can increase rare primate populations and at the same time create new income opportunities for young and healthy but unskilled human females.