FireWire options for 7010 usff - Audio related

Hello.

I'm looking for a way to integrate Firewire speed to my 7010 usff, I have been searching around for options but I only seem to find 1 option which is actually quite expensive considering the age of my pc.

Startech MPEX1394B3 StarTech.com 3 PORT 2B 1A 1394 MINI PCI EXPRESS FIREWIRE CARD ADAPTER which costs around £75-£100 new and seemingly hard to find second hand used.

Is there no other cheaper option for me ruling out buying a more up to date computer? I can live with usb3 but believe firewire is the most competent for my music production.