Program to toggle BT Devices Quickly?

[PolloLoco]

I just upgraded my car stereo to a head unit with bluetooth. A Sony mex bt2007 to be exact. And it works great - but I'm finding it annoying to transition between my headset to the stereo and back again. Specifically for stereo - if I have both on in bluetooth settings, then it seems neither the headset nor stereo can control the phone. If I turn one off, then I can control the phone and listen to music as expected.

The problem is that I have to go into Windows, Settings, Connections, Bluetooth - pick one device and turn it off, then pick the other device and turn it on. Is there a program that can automatically switch the selected stereo device? Or is there at least a shortcut (an exe) that will take me right to the screen where you select bluetooth devices?

Thanks in advance - I'd appreciate any help.