It should be possible. Out of the Two I would like to see a NES portable more (I have two. One in a closet and the other hooked up to my old console TV in my workshop)
Ben has already featured some builds for these systems in his book "hacking videogame consoles". It can be a bit hard to track down, but there are also some builds on his personal website.
here are the pages That Ben has for these builds. These are his hand built ones versus cnc machine made ones. and they have all the files that you need.
