HP had bought 3com in 2010 and effectively seem to have wiped out the 3com name.
Google searches for "3com drivers" and similar turn up websites that provide links to drivers which I am loath to download as you never know what else they may contain. On HP's own site trying to find anything 3com is painful.
Then I tried a Google search for "official 3com drivers". I found this part of the HP site that will provide the HP eqivalent of the 3com driver, http://h17007.www1.hp.com/us/en/support/converter/index.aspx.
I was looking for the driver for a 3crpag175b and found the "HP 802.11a/g XJack Wireless Client PC Card" driver which works perfectly. Direct link to the driver download page is http://h17007.www1.hp.com/us/en/support/converter/index.aspx?productNum=3CRPAG175B
