Don't forget the option to dye your own fabrics. Check outa few books at the library on the subject. You can get the marbled look in just about any color you might need. I just scrunch the fabric up, stuff it in, and let it soak up the dye. No need to tie it!

This is great for use on the white on white prints too. Remember to piece the fabric before you dye it if you need to, and100% cotton thread will take the color of the dye too. (At least the Connecting Threads brand did.)

Congrats on your wide backing purchase! I have also found 120" wide muslin there too.