connect a firewire 800 soundcard to Dell XPS 15

I have a DELL XPS 15 9550 and a soundcard (Focusrite Saffire LE) which connects through Firewire 800 to the computer. I can not find any way to connect it to the Thunderbold 3 input of the Dell laptop. Apple has released an adapter with female firewire 800 but male thunderbolt "2"...

Any solutions?