Mr. Dave Corbin, corbins.com or swage.com, has posted his books on his web site for review, downloading, etc. Sans pictures. In the books he discusses this. If you are going awful small, .14 or .17, maybe .20 you can use a hand press to make small pieces of wire. Much larger and you must have hydraulic power. With appropriate dies (not cheap) and power and pure lead, or other dies for some alloys, you can make your own wire. With the expense involved, not practical for just anyone. If that suits you... luck.