Billco International, Inc. Billco, Bilco, custom souvenirs Billco International located in Florham Park, NJ develops custom souvenirs for distribution, wholesale, and import to tell stories about all the great tourist destinations in North America. Since 1986 we have provided supply souvenirs of National Parks, Theme Parks, Cities, National Landmarks, and more. Our wholesale souvenirs are unique, stand out and create memories for all travelers.