I recently purchased a case (bright yellow) from Cansel Survey Supply in Burnaby BC. They had to bring it in from the east, but it only took a few days. I think the cost was around $55.00 CDN for 12 cans. I suspect that any survey supplier can get it for you. The product I have is made by Aervoe and simply called "Inverted Marking Chalk". The can says it is made in the USA.