Chewing Binder Edging, Where to find it??

I have a chewer, and she ate out good portions of her coroplast in the previous cage(s). I have just finished cutting and placing the new coroplast into the larger cage (yay!) and it has 10.5" sides all around except for the front portion of the main level. I want to get some binder edging for this area because it is only 6" and she will chew! Does anyone know where I can find some for cheap? I've googled it but nothing comes up, does it go by another name possibly? I am not buying from GP Zone because the 6.5 pieces I would need for the front part only will cost me $19, which I think is crazy.