I have a 2004.5 ram 48RE cummins. I bought it with 140k. I got the cruise control to work ONE time. Since then I replaced the vac pump and the vac lines to the servo. The pump pulls vac and shuts off as it should, tho original pump would run continuously so I replaced all the lines and pump like I said to the servo. The servo is rusted out and doesn't look healthy. I CAN NOT find a replacement as mopar stopped manufacturing them. Any help would be greatly appreciated