Agreed. I could probably figure out how to get a title. I assume the frame has a vin and I could somehow work to get a title for it either as abandoned or otherwise.
From there I'm not sure what Moab requires? I did some searching on Pirate and this popped up.
http://www.pirate4x4.com/forum/showthread.php?t=33922&highlight=moab+license+plate