Well I do have a "few" extra Cummins B parts as well as a few spare Dodge parts

My buddy has a 90, a 91 & a 92 Ramcharger and 2 93 W350 Cummins powered work trucks. He got all my spare 1st gen body parts.
Actually I do not have a shifter knob insert... anymore. I sold all the NV5600 stuff when I installed the G56. It is installed in a 96 3500 now. If I come across one I will save it for you. I thought about using one of these:
http://www.genosgarage.com/CUMMINS-C-POWER-SHIFT-KNOB-RED-89-12/productinfo/SHIFT_KN_R/ The mains reason I didn't is because my shift pattern in different from stock. I thought about putting a decal ( that's pronounced "dek all" up here not "dee kal" :-laf on the dash to indicate the shift pattern. My boss is originally from Louisiana so we joke about the different pronunciation of words all the time. Shad