Looking at PCI WLAN for use as an AP

I am trying to find a PCI WLAN abgn card that is compatible with IPFire. The only ones I can find are USB or PCIe. My machine is limited on expansion slots. I have two. One is a PCIe x16 which I will have a quad gigabit ethernet card and one PCI slot. The machine is also low profile. I had my eye on one then found out it was no longer carried. Finding a card for PCI seams to be quite a task. Any suggestions would be greatly appreciated.

Hello, TP Link TL-WN751ND is low profile, works well with IPFire and can probably be found on ebay.

Thank you for the info. I have since found other WLAN cards. There is also a mini pci to pci adapter that can also be used.