The plush piano frightens me.
This is a stage for Dutch comedienne Brigitte Kaandorp so you might get some help from her management if you want to try that. It could also very well be a unique piece built by a props department. The fact that there are seams in odd places makes me think that is the most likely answer. (Well, also the cartoon quality of it.)
Found it---or rather, found a Bretz chaise that has some of the same elements. But it has more human proportions than the thing in the comedienne's stage show. I think maybe hers was indeed a stage prop based on the Bretz chaise, but even more exaggerated.
It wouldn't be hard to do if you just did a plywood box for the base instead of doing springs. Also, the fabric looks like low nap plush, the kind used for stuffed animals for kids. They used the same fabric on the piano, too.
There are two seams on the outside of the big scrolled arm/headrest/whateverthat'scalled on the chaise---no real upholsterer would put seams there but a props department would because it's not something that matters at all in that setting.
If one wanted a piece like this in one's home, it might not be that expensive to have it custom made. Depends on your budget, of course.
Here's the Bretz line. I think it very likely served as inspiration for that purple behemoth.
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