It's probably easiest to swap in a different 119 or 129, but if the viscus coupling in your old one is still good (and it may be from your story) I'd pull it and keep it. There are probably several people here who have a whole transfer case you could use.
Alternatively just about any modern Jeep case can be adapted. Look for a fixed rear yoke on the case or grab the drive shaft as well when you pull it so you can have it adjusted for length. There's a few writeups here, but there is a little bit of work is needed to make everything fit.
Make sure you check the fluid in it every year! My original case has nearly 200,000 on it with all original parts, it outlasted two transmissions, an engine, and a rear axle shaft; so they can be pretty reliable.