I think I may have mentioned this before, but we had to order them direct from Lego because Toys R Us didn't have enough of the right shapes in stock. As it was, we bought their entire stock of grey Lego plates and had to order more (we used about 30 of them on our large bed laser).

Mark Dickens
Precision Laser Art, LLC
www.precisionlaserart.com
866-716-0300/901-888-1019