It seems that the industry description for the floor size ashtrays with sand are called "Sand Urns" in the trade.

The sand imprinters that you're looking for are called "Ashtray Sand Printers" by one supplier. See their website at:
http://www.sandscripts.com/catalog/business/sand_printers.html

Based on these custom-made prices, and durability of the sand printers, I doubt that GN would give them out, but enough cash might help.

Alternately, maybe you could have a custom replica made, if you're willing to pay the cost.