Is there a fitting for this?

I have “therapy jets” on our pool that are never used, and I would like to cover the air intake pipes with something more aesthetic. The pipes are 1-inch pvc that are almost flush with our travertine (see pic). I’m envisioning something that looks like a flat mushroom, with a shaft that will slide into the pvc and a head that’s big enough to cover the cut in the travertine but not so high it becomes a trip hazard. I can 3D print something but if there’s a readily available option would prefer to go that route.

Thx for any suggestions!