your only hope is find one on ebay or something. they were never popular in the first place and are no longer in production. if you are lifting it to get big tires on, be aware that the front can't handle much bigger than 33's.
Another method to lift your Durango is to get a body lift kit. Performance Accessories is a good brand and offers a 3 inch body lift. You can fit 33's but depending on the tire width you might need to do some minor trimming.