Why dont you get your mate in the sign trade to cut some stencils for you instead of cabinet decals?

If he does vinyl signs which im sure he does, then its a case of vectorising each colour on cab design, resizing and then cutting on his plotter. This way, you can recreate whats on the cabinet and retain a more authentic look.

Stencil vinyl is pretty cheap and so is the low tack clear application paper.

It takes 12 scans to scan a 600 X 600 BG - this has a large overlay on 3 of them. To do a cabinet will take many more, then stitching, printing etc.
 Im just thinking that for the amount of time you are going to spend scanning the cab - stencils would be a little quicker??