[gmcdan1963]

"Have you tried call American Autowire to see if they have any?"

I have not.
They have products for Chevy trucks, but don't list the GMC trucks as a direct fit (unless it gets the common lump together with Chevy).

I don't know if they manufacturer the terminal ends themselves or if they buy for a supplier.

The hours for customer support are during my work day, and I have not tried to call. I can send an email, but it's not really tailored to a harness they sell to a direct fit vehicle so i don't know how much info they will have or how much effort they will put into it.
They sell top notch stuff in my opinion and will definitely give it a try. I don't mind doing the leg work if no one else has gone down this road before. I think part of my issue was terminology. I want to call the terminals and use the delphi/packard name and I wasn't having any luck. With the second link you provided, it had some promising options without the term "terminal".

If anyone else has any input, fell feel to chime in. I'll take whatever leads I can get.

Thanks,
Daniel