Roll-top desk style key cover--- that's different, anyway.
It's a good question, whether and where they might be available in the US. Schultze-Pollmann is an Italian piano maker--- nice pianos; expensive; known for their beautiful veneer work and sunny sound; not many outfits carry them in the US, but there are some.
I'm just a little tempted to inquire at that "info@" address, out of curiosity... though the light-colored stain on the cabinet wouldn't suit my decor. But I imagine they're trying to break through the 'housewife barrier.' Many gentleman players have had a problem with this: "You're not going to put that
in my living-room
No need to quote the rest of the conversation.