Funnily enough I was looking at upgrading the mini-pcie card in one of my PC's to add 5Ghz support and I'm sure I saw an Intel card with dual channel and Bluetooth.
I decided to go another route so didn't note the details/model.
It would help if you said what type of adapter is in there now, with what bus interface and how many aerials (usually 2).
And are you sure it doesn't already have Bluetooth?
