Doug,
I have used a ready brake on my wrangler(s). Found a used roadmaster tow bar for half the price of a new one. If you are handy, the ready brake is not hard to install yourself.
With that being said, I just purchased an RVI brake system off craigslist. Tested it out today on my Tacoma. Works as advertised. Paid 1/2 price for it. I will be taking my Unified brake system off the Tacoma.
Good luck with your search. Craigslist in a good source, so is IRV2.com as they sometimes have this kind of stuff posted in their classified.
Bob