Whipped this up as the part where the fill tube connects to the innermost shaft of the toilet valve cracked. I printed it in PETG on a Prusa Mini+, too, about an hour. 100% infill with .2 layer height.
I printed it on its side so I used less material and the stress of the hose “pulling” to one side might be better with layers oriented that way. Hose is a touch snug, but wanted to make sure it stuck and didn't slip out. Reused the foam “gasket” from the original device.
The author marked this model as their own original creation.