I got the hard copies of the manuals for every generation of DSM off of ebay. The hack is to buy the Talon manuals as opposed to the Eclipse versions. For whatever reason, they are exponentially cheaper. I got both volumes (Volume 1: Engine, Chassis, and Body, Volume 2: Electrical) of 98 Talon FSM brand new, unused for $15 total. The Eclipse versions can be hundreds, for whatever reason.
You will likely pay through the nose to get those. If it doesn't matter to you for some reason talon manuals are cheaper. Search eBay. There are some there