I do agree most flat panel doors you see are most often in mobile homes or, low end manufactured homes. I wasn't referring to those type doors, but more along the lines of what sdsester posted pictures of.
I stopped at the local lumber yard, and even browsed suppliers online and I'm still unable to locate what I ultimately want. Since I have nice solid 6-panel doors now I've decided I'm just going to modify what I have.
I have access to the equipment I need so my plan is to insert two long vertical strips of brushed stainless steel where the panels are now. Some simple modifications to the door and we'll be good to go.
Basically like the picture attached, but painted black. I'll post pictures once complete in case anyone is interested.