Where do you order 100 tons of simulated moon dust?

What a Little Moon Dust Can Do, Wired

“American researchers have hardly bothered to study the topic since the United States ended the Apollo program in 1972. And foreign studies on samples from the Soviet Luna program have been widely rejected on the grounds that the studies were flawed. Getting studies rolling again will not be easy. Laurent Sibille, a research scientist with NASA’s Marshall Space Flight Center, estimates that researchers will need 100 tons of space dust for testing in the run-up to a new moon mission.”