I have been given an old full tang blade and would like to have a custom handle made, possibly out of cape buffalo horn I have. Any suggestions on who to go to? Thanks for any advice.

Go to Knifedogs & look at the handles on the custom knives & pick the material that you like & use that.

Try this guy. I can't vouch for him, but have seen some of his work in person and it looks good. http://kniferepairs.ca/