Where can I pick up sand to spread on my sidewalk to improve traction?

The town has several locations to pick up sand. They are: 1) Sharshon Park (Skitchewaug off Windsor Ave.) parking lot; 2) L.P. Wilson Community Center (599 Matianuck Avenue); 3) Mechanic Street commuter lot (located behind Town Hall and next to the dog pound); 4) Oliver Ellsworth School (Kennedy Road) back parking lot; 5) Poquonock Fire House (1575 Poquonock Avenue) parking lot; 6) Rainbow Firehouse (750 Rainbow Road); and 7) Public Works Facility, 99 Day Hill Road.