Massaging seats

[vibesg]

I am aware that Dynamic Seats were available (though rare) as option on the W219 CLS.
Retro fits will be stratospherically expensive.

Has anyone come across a kit or an alternative to the MB option?

I have a stand alone plug in vibranting seat but it just shivers and shakes and is not up to the job. It is also noisy and does not suit a CLS.

Has anyone travelled down this road? Perhaps I can benefit from your experience.

Thanks.