You all probably allready know this but I'll share just in case.....When I was doing my glow plug system R&R, one of the big cost was going to be the outer wiring harness. ($400.00) I was looking for the terminal ends so I could just splice them but I was told they dont make them for the OBS. I found the kit for the 99-03 PSD which has a single plug to the center of the valve cover gasket with 9 prongs on it but not the ones for our trucks.
I have a buddy that works on these fairly regularly and he brought me the new plastic ends and the terminal wire ends with the prongs allready installed on them. These apparently came directly from International. I'm not 100% sure of the part numbers because they came loose in a bag but from the instruction sheet it appears the numbers are:

Connector: 1815918C2
Retainer clip: 1818085C2
Seal: 1815919C1
Terminal end wires: 2501055C1 (I'm sure of this number) $5.95 for 10
Extraction tool: 1830380C1
Instruction sheet: 1171710R1

As far as the small rubber gaskets that go on the terminal end wires, I dont have that #. I ended up just reusing the old ones for that. Sorry for the long post but I hope this helps someone else out.

 

Actually the pigtails are available from a place in Idny,I don't have the info handy but will tomorrow.T.J. will have it before I get back i'm sure,afterall he is the parts GURU.