Terasen Waterworks also has an outlet in Richmond, which is potentially closer (however, depending on your daytime availability, their hours could be a challenge, not open on weekends, and 7:00 to 4:30 during the week).
http://www.terasen.com/Waterworks/Default.htm
For small amounts of flex PVC, give Green Line Hose & Fittings a try (on Annacis Island).
Regards