Hello kmorpheus6
I apologize you are correct it is not soldered to the motherboard and HP does have a list of compatible WLAN Modules. I am providing you with a link to the HP Support document HP Pavilion G6 Notebook PC Maintenance and Service Guide for your computer and if you reference page 47. You will not only see the part numbers for the different modules you can swap out, but instructions for doing it. Using the part numbers you can order the desired WLAN from the HP Parts Store.
Once again I am sorry for the confusion. I hope this helps. And once again thank you for posting on the HP Forums. Have a great day!