Check the for sale section, it seems like WJ knuckles come up for sale 2x a year or so.
You might also want to put out the word in your local chapter.
Just to clarify, you want to a brake and steering upgrade simultaneously? If so, the WJ is a good setup, but will still require some messing with. ( swaybar brackets and OTA trackbar mount)
Have you upgraded the master/booster yet?
Is your 8.8 in? Did you do the proportioning valve?