Where can I find cheap ivy?

For my last room in my haunt, I will be covering the walls with camouflage burlap and netting, then I plan on using fake ivy ( hanging it from the ceiling and off the walls ) and other things like that to make a garden area.
I want to find some ivy that is almost like netting (in the sense that it's not just one strand of ivy). Does anyone know of where I can get some, either online or in stores? I will check the websites for a few craft stores.
Thanks in advance!