Theres also a place in surrey that sells it
www.plasticworks.ca,I have black starboard for a few tanks.A question ruth,did you silicon it down or just use the rock to keep it down?and are you worried about trapping detritus underneath over time?It turns out its cheaper than sand too.
EDIT:sorry ruth just curious.....did you do the recomended upgrades that go with the BB method? like oversize skimmer,or run ozone,uv,ect?