[jimmontg]

Does your friend have a grinder? It's hard to recommend something not knowing what he may or may not have. I can say to buy him some high quality files like some Nicholson in 8" to 12" mill files, also throw in a half round file for curves. Some good quality wet dry sandpaper is always used same as the files. Also possibly a book or videos. I'm sure Ray Rogers, a moderator here, has some videos he's made he can recommend.

Like I said without knowing what your friend has and going by the fact that he's made a couple of knives it's hard to guess what he may want or need.