Coroflute too much $$$$

[i love piggies]

I live near Albury, NSW. Recently I have tried to get some Coroflute and I am so shocked at the price of it. I have a few cages and I would love to deck them all out with Coroflute, but it's too expensive.
A local sign shop has sheets for $50. Clark Rubber & Foam have small sheets for $9 (this isn't too bad but they're really small)
Does anyone know of anywhere I can get some cheaper, or is this the normal price?
Thanks
Dee