Chuwi Corebook Pro replacement keycap and hinge

I have a Chuwi Corebook Pro and I would like to know if there is any chance I could buy a replacement keycap and hinge for my down arrow key that broke off my keyboard. Since the laptop is not made by a big brand, I am having trouble finding keycaps and hinges. Please let me know if anyone knows where I can buy some or if there is any hinge and keycap of another brand compatible with my keyboard.