They list dealers on their website - it appears the options on the left coast are limited. They have a US presence now but I am not sure what they are doing exactly. I emailed them this summer with a question but never heard back (the folks in Spain did reply, however).
NORTHEAST MB as AYA- USA
Distributors
P.O.BOX 647
OLD SAYBROOK, CT 06475
USA
PHONE 860 388 3989
FAX 860 388 4657
aya-usa@aya-fineguns.com
http://www.aya-fineguns.com/home.php?c_idioma=1I spoke with New England Custom Gun about ordering a AyA O/U but never went through with it. They seemed knowledgeable and others who have dealt with them have had favorable reports.