ZJ 44 disc brakes

I am beginning to research doing the rear disc swap on my 44 as a winter project, and in order to do so I need some rear discs! I have read taht teh easiest way to do it is with teh ZJ discs. So does anyone have some to sell or have a line on where to find some? I have called the local U pulls and noone has any recently dropped off ZJs. So, just dropping a line on here to see if any of you"industry professionals" have a line on them.
Also, I have done a fair amount of reading, but if yu have good articles on the installs, specifically teh proportioning valve I would be interested in reading it. Thanks!