Plant based clumping litter (West Toronto, King/Dufferin)

Hello, struggling student here. Hoping to acquire some plant-based clumping litter for my kitties, such as walnut, corn, wheat, tofu, pea husk etc. Somebody did donate some pellets except my cats don't like it and they've started pooping in the tub. 😫 I have mobility issues at times so can't go too far. Thank you for your help.