You have a pretty good jeep salvage yard up in Phoenix, can't remember their name. I'm fairly sure Willys Works down here in Tucson will have one as well.
You can have your bell housing welded up, cracks are not uncommon. The area around the fork can be built up and file to fit, tolerances in that area aren't very tight. The bottom of your bell housing is often cracked, it's thin and just there to keep dirt out. Mine was cracked so I welded it myself with a special aluminum rod for stick welding. Now that was a trip, weld at superman speeds and it does alright, slow down and you have a mess. Luckily I'd seen a video and was lighting quick on the first pass.
Tell us more about your driveline problem. Mine isn't exactly lined up (right to left on the body) that is relatively normal. It seems wrong, but make sure the output shaft and the input (yoke) angle are roughly parallel. Yes I know it’s tempting to wedge your axle, if you do that you’ll need to drop your transfer case to match. Why? It was explained to me that universal joints tend to speed up and slow down as they do their thing. Both ends having equal angles tend to cancel out adverse the effects. Others might disagree, but I’ve heard the same from a few experts that I trust, so “That’s my story and I’m stickin’ to it.”