I have a first generation Mac Pro and I am in need of an airport card. I was wondering what cards would work (i.e model numbers, part numbers?). If i specifically search for ones for mac pros they are generally are very expensive, but if they are listed for iMac or macbooks, etc. they are cheaper. Can i use one from a different computer? And, lastly, i've seen pci-e broadcom cards from HP and other manufacturers, would this work? This is a lot, but I am trying to get something decent and a reasonable price.