Scrim

I am the Tech Director of NEO Production's version of tick, tick...BOOM! and our set designer has requested four screens (1.5m width 2.5m high) made out of what he calls "material that when you back light it it becomes almost transparent, and when you front light it it is almost opaque," which is what I call "scrim." So I am looking to buy enough of this material to make these four screens. I have discovered that to buy actual scrim costs a fortune, does anyone know a budget alternative?

Thanks all!

Cheers,

Scott