Hello,
Check out this website for generating copperplate guidelines, as well as guidelines for other hands:
http://calligraffiti.in/rulingsI like this generation program in particular because it will put in the diagonal guidelines at any angle you want. In addition, the lines are dark enough to see through a blank sheet of paper. I prefer to put my guide sheet underneath my paper with a clear plastic sheet between rather than print the guidelines on each sheet. Finally, the program allows both portrait, landscape and circular formats. The only drawback that I see is that it only prints on A4 and A5 paper sizes, but most printers will convert to the US sizes. The instructions are also good I think!
Ellen