Looking for 1 female TRRS to 2 male TRRS split cable

Hi all,

I have a mobile phone with a TRRS (4 pole, 3 ring, 2x audio 1x ground 1x mic (mono)) connection. My laptop has samen connection. Now I want to use 1 headset for these two devices simultaneously without having to unplug when someone calls me on my mobile phone.

Have been looking for this for a few weeks online, but haven't been able to find it.

Any help is welcome.

Are they both 3.5mm? Older phones usually had 2.5mm plugs. You might best just order some wire and the plugs to make your own cable.