What year is your G? Is the truck parked or do you get water after driving on wet roads? If when parked, the rhino horn antennae has been known to allow water into cab. Also check your sun roof drains on drivers side and make sure they are clear.
Good Luck
Well I suppose one way of looking at it is that your total cost is equivalent to the retail cost of 2 seals plus 2 hours of shop time.