Bluetooth straight to amp

I am trying to find a way to connect to my amp via Bluetooth so I can remove my head unit all together. I have a pioneer GM-DX875 and just want to see if there is an adapter on the market that allows me to hook my phone straight to the amp via Bluetooth.

I know kenwood sells an amp that has a Bluetooth remote that has its own volume, skip, and pause/play buttons built in and I want to find something as close to that as possible.

Any recommendations? Thank you!