I've been down this road recently I live in Hillsborough and have figured out that there are not a lot of places to look at double rifles in the area. If the guy mentioned in San Mateo is Mike Krause at Krausewerke, he might have one every couple of years (I'm in there most weeks, it is a great shop otherwise) The only place even vaguely close is Sportsmans Access which is up past Sacramento. He usually has a few, and I know has a Wilkins .700, an Army & Navy 577 (mine which I am selling) and a couple of others, or at least he did a couple of weeks ago. By far the best idea is to go to the SCI show in Reno in January. You can see dozens, including all of the curent manufacturers. Last year I eneded up buying a Searcy 3 barrel set there.