I can help you with a reproduced Hornet sticker and show you how I duplicated the factory striping. Comet torque converters are a direct replacement for the V-Plex converter. The converter cover you got should fit and you are good to go. Also, if you need new bushings for the sleeve where the bolt for the forks goes they can be sourced from McMaster& Carr.
The cover turned out to from a Power-Dyne so I'll be hunting for a correct one again. I believe I have another issue that needs attention as well. The bracket that secures a cover. Looking from the side of the bike it has the "L" bracket in front of the drive unit but nothing behind the drive unit. I'll need to find a pic from someone showing tge correct bracket design. Manco rims have "spider" cracks in them as well.