There have been very few parts that I've needed that any dealer has had in stock. granted, a 2500 is an even bigger odd ball as far as they're concerned. I think the only parts ive seen them have thus far is the evap solenoid and engine grounding strap. I've definitely gotten into the habit of having every spare part in an assembly on hand before starting a project, then just returning what I don't end up using. Usually, with the rust, its a pretty sure bet.