This is a huge PITA (and I'm not talking about bread) without a router - you didn't mention what tools you had
I cut one from scratch for my Ibanez ATK, using a jigsaw for the rough work before I sanded the 45 degree bezel.
The neck pocket was the hardest part to get right, I had to settle on a half mm too wide - it looks great from 2'away as the bass is black, but it would be more obvious on a contrasting colour.
To get the final straight edge to the bezel I used a a sharp paint scraper, and was able to eyeball in when I was finished as the blank was three tier B-W-B. This part actually worked well, resulting in a smoother surface than the standard router leaves.
The hassle is that even with the protective plastic on, I still scratched the blank while I was sanding it, necessitating a sand-out. For the time being I've left it at a satin finish, as it provides contrast to the gloss of the body, and would end up that way over time anyway
