I got it from here, this distributor has the best reputation for service and response to questions to emails.
http://www.mark-1-tank.co.uk/

The main manufacturer is here
http://www.interdacom.ru/~tanks/

and he has a list of distributors on his page. Be forewarned though they arent cheap. Also i dont think the US distributor carries the Leopard on his available list yet BUT he can probably order it all the same. Turnaround is 6 months. For a lifetime warranty it is worth the price though.