Here are two YouTube videos showing trilobite preparation lab back in
2005. That is an amazing plate they quarried so many crinoids and the other plate showing so many intact trilobites and a starfish. The location is Erfoud, Morocco. The trilobites shown in the video are
Selenopeltis bucci,
Asaphus, Onnia and
Bornstrella.
The second shows more of the lab. They have quite a fossil inventory there!
Videos from YouTube user ajmiller82 and their web site is
http://www.ancientearthtradingco.com/