For the bumpers, try Classic Parts of America.
http://www.classicparts.com/Bumpers/products/324/ They have painted bumpers. I can't speak for quality, but they have them. I'm sure if you check other places that typically sell these, they should have them. You might also check with Nsanehotrodz here on the forum
http://www.nsanehotrodz.com/ He sells quality stuff, from what I hear. And he'll stand behind the parts.