Well if I were going to make an electro-sapper, I would first decide how sturdy I want it to be. If you want just a one-time deal then here’s a papercraft: http://bit.ly/nhEQ50 But if you’re like me and would like it for cosplays to come, and would also like it to act as a purse or lunchbox of sorts (for convenience’s sake) I would probably make it out of a plain, wood or papier mache cigar box similar to http://bit.ly/pLYX9n and use the bottom as the front. Probably make the handles out of wood or foam. Craft foam for the hood on top. I would at least attempt to print the image on some high-quality paper and glue it to the bottom. Use the barrel of a coke bottle for the meter screen, and surround that with craft foam for some depth. Knobs and switches you can find at a hardware store. You could probably get away with spending about $15 on this project. Happy cosplaying!