Yeah wow, I haven't seen Firewire (1394) on a device for years and years. I used it fairly extensively on camcoders back in the day, but once DV tapes were ditched in favour of solid state storage the latency and more reliable sustained transfer speeds that Firewire provided weren't important anymore. I'm actually surprised that case includes the Firewire front panel.
Do you actually need Firewire, or are you just looking to make sure everything in your case is actually connected? A bit of Googling tells me that some audio production workflows do still leverage Firewire. So, if you really do need it there are add in cards you can get, some of which include a header for your front panel.