You have the pattern now, just a matter of scanning, resize to a measured hood and began to work it a bit in photoshop. Now given the size, you'll have to find a shop that can cut something that wide as it doesn't look like it's in segments. It could be, if so, any local sign shop could cut it and then you have to align during install (not that difficult) using a soap/water solution just like you use when window tinting.
I used to put the big Trans Am birds on cars at the dealerships and used car lots. Just clean the hood, degrease/dewax, solution on both the hood and the decal and slide into place. You can watch a lot of videos online to do this or have a professional install it.
2014 Dodge Challenger SRT8 - Pitch Black, Automatic - 35% Tint, stealth splash guards, deep tint markers, Mopar CAI, Mopar Strut bars, Billet Catch Can and Caps, NavTool, Camera, LEDs