GMKtec K11 replacement top and feet

Print the top cover in anything you like and the feet in some sort of TPU. 
The top cover is held in place by friction, so the tolerance is small. 
To reduce the chances for the feet to break easily, increase the walls to 5 and infill to 25-30%.
I printed mine in ASA for the top cover and 95A TPU for the feet. 
The feet need to be glued. I used a glue for rubber.