I'm looking to add the rear seat entertainment option (U42), to my 07 Avalanche. I have everything needed to do the install including hardware and the full wiring diagram, but I do not have the factory plugs necessary to do the wiring. I've tried the dealership, but they show the harness included with the headliner. I've also been calling local junk yards and national salvage yards looking for these pigtails without any luck. I never thought they would be so difficult to locate given they are available in any 2007-present GMT900 with the U42 option.

I need the plugs or pigtails for:
-Overhead LCD (15948136) 10 pin plug
-I/R Audio System Module (15095547) also located in the overhead unit.
-C3 connector on the Radio/Nav head unit

Any help would be greatly appreciated.