Portable white backdrops -where to buy?

[filmat11]

I need a 12x20 ft or 16x20ft white background. I would prefer not to have to steam the wrinkles out of the whole backdrop for 2 hours, so a muslim fabric is not my first choice. Anyone know of a good backdrop sales/rental house.
I would even entertain a larger background if neccessary.
Thanks..

 

[cheezweezl]

just get 12' paper. seamless and wrinkle free. if it gets dirty, tear off the dirty part and trash. you can find seamless paper in many colors at any larger photo store or grip/gaff supply.