I am sorry to say that there is no place you can just order a G.smithii. With the exception of O. scyllarus, mantis sold in the trade are not identified. Everyone that has one, either bought one from another reefer who was ready to move on (and as the most popular of the mantiskept, they get snapped up with in minutes), or by blind luck ordering a "mantis" from one of the online venders. The down side to that is that you could get a big G. ternatensis that doesn't fit into your system.