I'm not sure how many states besides these out west Discount
Tire has retail stores in, but, despite the "discount" look
and feel these guys know their tires.  I have two vehicles
that require tires that only that vehicle uses (Range Rover
and Vanagon) and Discount knew what I needed as soon as I
said the name of the vehicle.  When something like this
happens with a European car it's a pretty sure bet Michelin
makes it, although in the case of Vanagons so does
Continental, but its quality is #2 in this group.  It's not
likely you'll see Vanagon tires in mail order ads as the
cost of the space doesn't justify it, but both Tire Rack and
Discount (they mail order as well) know what MXs are
(they're not the Jimmy Carter missle).