if you were using the bobamaker tutorial were would you find the strips of alluminum???????
If you are looking in the States...look at Ace hardware. Strip metal is usually close to the aisles of bolts and specialty hardware.
How do you stick the spikes on the aluminum bars? Weld it?
Try JB weld.
Visit our other communities which focus on Movie Props, Predator Costumes, and Halo Costumes.