Are there any generic holders for synths on top of synths?

[lfm]

Hi
There are some laptop holders, part of accessory for a certain keyboard stand etc. Fasten on stand as such, meaning you need that particular stand as base.

But is there something generic that fits on back - like a clamp on synth?
As a platform to put smaller synths and module like hovering over it.

There are various stuff that fits on desks for VESA holder displays. A clamp tightened on edge of desk.

So same technique but a bit thicker then, to fit over synth on back.

Any ideas?
Sometimes it's just finding the name for such gear to find the way searching the internet.

Thanks.

[AdvancedFollower]

Interested in this as well. Currently my desktop units are kind of scattered on the table so they take up quite a bit of space. Having some on a second tier above them would clear out a lot of space.