I know most folks with those California 12 valves (94-98) yanked the EGR valves. Not sure if you'll want to buy new stuff, but I can dig into the archives and see if any of that junk is still available from Cummins.
Here is a youtube link from a guy that pulled his off. Maybe you can contact him ??
Dodge Diesel EGR Delete - Stuck Valve Almost Killed My Cummins! - YouTube