Unfortunately some of the images are gone
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=278755&page=all

C.J. Opacak posted a tutorial long ago with pics of his jig but I couldn't find it

Another with pics of the jig. I don't know who the poster is.
https://www.shotgunworld.com/threads/first-stock-bending-experience.527328/

Mike Orlen's article from "American Gunsmith" magazine was posted by Juan Carlos Jobet here but I couldn't find it either

Jack Rowe's Video
Part 1



Part 2




For Ted. I wouldn't use this fella wink

[Linked Image from photos.smugmug.com]