FYI cheap and good quality seldom go hand in hand.
Besides there's many good tutorials regarding making waraji floating around the internet and I've got the impression that most people make their own.
*~Cosplays in progress~*
Sanosuke Harada - Hakuōki: Shinsengumi Kitan
Kojirō Sasaki - Iza, Shutsujin! Koi Ikusa
Kenshin Himura - Rurōni Kenshin