I took a look online but couldn't find a website for DUSO's but did find this contact info - maybe you want to write, call or send a fax? I'm wondering myself if they have an outlet as they are just around the corner from me...I'll have to take a peek next time I am down that way.

Duso's Enterprises Ltd.
3930 Kitchener Street
Burnaby, BC V5C 2M2
phone:604 473-9797
fax:604 473-9799