Jason Voorhees (Friday the 13th Part VII)

So i rescently started cosplaying.
My first cosplay was one of John Marston (Red Dead Redemption) but the beard kept failing.
So when i went to my first con, i bought a Jason mask to cover up the failed beard, and so i started the Jason Cosplay.
With no time to make a costume anymore i adjusted the John Marston costume a bit to get this result:

As i wanted to go further with this character i now am creating a more realistic costume based on Jason in Part VII
Now i am waiting for the shirt to sow in the ribs and suff like that

The biggest issue i have right now is how to make a spine for the costume.

I (completely inexperienced) would suggest buying a skeleton costume with rubber-sewn on-bones and use that repainted to your liking! or you could use eva foam strips and tabs cobbled together. i also want to do a part 7 so keep updates will ya?