1) Have you checked the local wrecking yards? I'm sure that you can find one if you look around DFW.
2) There's a 4wd place on 380 just east of 288. You might try calling them - maybe they have a Dana 30 takeoff sitting around their shop.
3) Call around to the DFW 4wd shops and see if they have any takeoffs
4) There's a guy over in Haslet that sells a lot of Jeep parts - you can find him on Craigslist.
My Ammo Can Console: http://www.jeepforum.com/forum/f12/yet-another-ammo-can-project-finished-1498520/
My 8.8 Swap: http://www.jeepforum.com/forum/f12/yet-another-ford-8-8-swap-extras-1565339/