Hard to find parts

[xbanone]

I have a '76 GMC K15. There are a few parts for the 73-76/77's that are hard to find, I wanted to see if you all can help. I am mostly looking for interior parts and grilles.

I have a set of doors off an '81 C10 that I want to use. So which year door panels should I look for?

I also need a dash bezel, i would like to use a silver faced one like the '81 and up silverados used.

Lastly, I would like a grille in better shape. I want to stay GMC and with the 73-80 front end. I also have the external hood release.

I have a plethora of 81-87 parts but nothing for the 80 and down, I have checked all the usual places like LMC and Classicparts. Any other ideas?

Thanks
Brady