No problem but they only had one...........
http://www.ebay.co.uk/itm/160954179283?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
With regard to the other Pci-e slot (WWAN slot) I've thought about that too, HOWEVER, on giving mine a closer inspection, it doesn't exist! The space is there but no slot!
Before discovering this I also ordered on of these with the idea of plugging a usb dongle in it..........
http://www.ebay.co.uk/itm/290809078975?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648
Together with one of these ..............
http://www.ebay.co.uk/itm/140571060681?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648
Then for Bluetooth I have the poundworld one which works fine, it looks like this is the same .............
http://www.ebay.co.uk/itm/Bluetooth...K_Computing_Networking_SM&hash=item1e76693663
BUT the HP manual states that you can't swap the wwan and wlan card over, and googling suggests that some "pci-e slots" are actually usb connected only, so I suspect if you do have a wwan card fitted its a usb device on a pci-e "card"?
I'm expecting these tomorrow or Tuesday, I'll test them out if the card and dongle will fit in my wifi slot.
Pete (on his evolving mac)