This is the cyber spine that printed for one of my costume. I printed it with pla to prototype it and then use ninjaflex for the final print.This measures 12" (30.48 cm) long and about 1.5" (3.81 cm) wide. I do give you the right to change the model as you want but ask that you do share a link to it to help out the community.

Update 6/26/17 I have added an open top version