I was wondering if an actual PCI card doesn't work. Would an optical drive bay like this one on Amazon?
http://www.amazon.com/Sunshine-tipway%C2%AE-Firewire-Optical-Internal-Reader/dp/B00JXFHERU/ref=sr_1_8?ie=UTF8&qid=1437818496&sr=8-8&keywords=firewir...
http://www.amazon.com/Sunshine-tipway%C2%AE-Firewire-Optical-Internal-Reader/dp/B00JXFHERU/ref=sr_1_8?ie=UTF8&qid=1437818496&sr=8-8&keywords=firewir...