I finally found it!! long term lurker first time poster lol
Been following this topic for the past two years.
I just wanted something premade, simple, wireless and with acceptable price. I finally found it.
this is the link:
https://www.nouvolo.com/products/doio-3-keys-wireless-macropad
this is the review of the wired version:
it's a macro pad with 4 layers so you can have 12 different actions. not that I need it
I set it so that the buttons are previous,play/pause and next
the outer knob to be volume contro. Works perfect. also note that the body and the knobs are machined aluminum and not plastic.
Considering what it is I strongly recommend it for people who need a good wireless music controller.