On Google drive I have the word processing documents for at least some of the first draft.  These are the more-or-less originals (although maybe something was lost by converting 1999 word documents to 2017?--But if so I haven't noticed the glitches yet).
Chapters 1- 14:drive, docs, pub
Chapters 15-24 :drive, docs, pub
Chapter 25-27: drive, docs, pub
Chapter 25-31: drive, docs, pub
32-37--Can't find the original computer disks.  But the chapters are below on this blog.