Look into roadbase. From your pic, it looks similar to me. If it works, go to Groundworks Construction Supply-Vancouver
(604) 322-6790
https://maps.app.goo.gl/h7rjTyfxTqcBEeYa7
It's like $5 for 5 gallon bucket worth of roadbase, but bring your own bucket. I got buckets you can borrow if needed.