The HL tanks are plentiful online, just about every conceivable vendor has them. What's funny is they all look like clones as they use virtually the same photography borrowed from Mato Toys.

I initially did some comparison shopping which lead me to a site like [link=http://www.shopzilla.com/7S--Robotic_Radio_Control_Toys_-_cat_id--14011200__keyword--rc%20tank__search_box--1__start--40]this.[/link]

I got mine from Zhobby which like the rest appears to have some kind of corporate relationship with Raidentech.

GrandHobby.com
eGrandBuy.com
Zhobby.com
WonderHobby
IntelSpy.com
www.rctoyz.com
hobby-estore.com