Big Skinny have some nice RFID blocking wallets,
http://www.bigskinny.net/rfid-wallets-card-cases.html , I use this one for travel http
://www.bigskinny.net/rfid-leather-world-zip-bifold.html it is bigger so it fits large foriegn bills , the bills area has a divider so you can separate different currencies , it also has a coins pocket,
and it is very slim when full.