Great minds think alike.
Here is a post with a LOT of axle codes that might help you in your search. Also you might try a site such as searchtempest.com that makes multi-locational craigslist searches easier. Good luck!
p.s. In the future I would go to the IDI section of those forums first rather than the truck year. Possibly confirmation bias but, from my experience the IDI guys overall seem to have a much more in depth knowledge of their rigs.