Hi Brendan,

Get this one if you are ebay avid: http://cgi.ebay.com/Extreme-SMA-GPS-Antenna-for-Navman-U-Blox-Trimble-TNL_W0QQitemZ180045599596QQihZ008QQcategoryZ73345QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Ask for the 3 footer passive version, is just a plug n play :D, (the version shown there is active and has a longer cable)
regards

Rodrigo