where can you buy som nylon, rayon, 50% poly 50% nylon yoyo string?

The title explains it self.

50% poly 50% nylon?

O.o

Fabrics/Sewing store? Jo-Anns?
Wal-Mart?

Edit:
…LOL

Thought you were looking for thread to make string.

Chaos 422. This is my review: Chaos 422 String Review - Yo-Yo Reviews - YoYoExpert

Chaos 422, I make some, and so may many other homemade string-vendors, if you ask them.