A quick update. I just finished the 'standard' aka 'Johann's' Rostock 3D printer BOM and I believe I located the cheapest (small volume) suppliers around (all but two, European to save on shipping costs).
This means it is now time to start ordering all the parts for my "Generation 1" 3D Printer. I consider the first one as a 'Generation 1' because once it is build and performing well, it will just serve to print the parts of my own Rostock derivative I have in mind (Gen 2, etc).
As parts come in, it will be quiet on this blog, unless something goes wrong that's worthwhile sharing.
Keep checking in for the build process.