You're right, the GS's are harder to come by. I hunted and searched for a good long time to get just the right one, and I just bought it a month ago.
My suggestion: It might be worth your while to look around the northern end of California (i.e. Steven's Creek Lexus, Lexus of Serramonte, Lexus of Monterey Peninsula, Putnum Lexus, etc.) If you find the right price and the right car that you are looking for, it may be worth your while to fly over, purchase it, and drive it back. Or, see if the dealerships will send it.
;) Congratulations on the new one to come (baby & Car).